./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe015_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe015_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:12:57,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:12:57,972 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:12:57,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:12:57,991 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:12:58,014 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:12:58,015 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:12:58,015 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:12:58,016 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:12:58,017 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:12:58,017 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:12:58,017 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:12:58,018 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:12:58,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:12:58,018 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:12:58,019 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:12:58,019 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:12:58,019 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:12:58,020 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:12:58,020 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:12:58,020 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:12:58,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:12:58,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:12:58,022 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:12:58,023 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:12:58,023 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:12:58,023 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:12:58,023 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:12:58,024 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:12:58,024 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:12:58,025 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:12:58,025 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:12:58,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:12:58,026 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:12:58,026 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:12:58,026 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:12:58,026 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:12:58,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:12:58,027 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:12:58,027 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:12:58,027 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:12:58,028 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:12:58,028 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:12:58,028 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:12:58,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:12:58,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:12:58,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:12:58,322 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:12:58,323 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:12:58,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i [2024-06-14 13:12:59,567 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:12:59,852 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:12:59,853 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_power.opt.i [2024-06-14 13:12:59,867 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8112d3aa3/e8e9fa0446844733803c804271d2de97/FLAG07e1c258d [2024-06-14 13:12:59,881 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8112d3aa3/e8e9fa0446844733803c804271d2de97 [2024-06-14 13:12:59,884 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:12:59,888 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:12:59,889 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe015_power.opt.yml/witness.yml [2024-06-14 13:13:00,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:13:00,111 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:13:00,114 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:13:00,114 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:13:00,119 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:13:00,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:12:59" (1/2) ... [2024-06-14 13:13:00,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74777e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:13:00, skipping insertion in model container [2024-06-14 13:13:00,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:12:59" (1/2) ... [2024-06-14 13:13:00,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2bda92bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:13:00, skipping insertion in model container [2024-06-14 13:13:00,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:13:00" (2/2) ... [2024-06-14 13:13:00,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74777e69 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:00, skipping insertion in model container [2024-06-14 13:13:00,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:13:00" (2/2) ... [2024-06-14 13:13:00,124 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:13:00,272 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:13:00,274 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 13:13:00,274 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 13:13:00,274 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 13:13:00,274 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:13:00,274 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-14 13:13:00,323 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:13:00,746 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:13:00,759 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:13:00,993 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:13:01,039 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:13:01,040 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01 WrapperNode [2024-06-14 13:13:01,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:13:01,041 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:13:01,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:13:01,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:13:01,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,116 INFO L138 Inliner]: procedures = 175, calls = 111, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 278 [2024-06-14 13:13:01,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:13:01,118 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:13:01,118 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:13:01,118 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:13:01,128 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,134 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,187 INFO L175 MemorySlicer]: Split 68 memory accesses to 2 slices as follows [2, 66]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-14 13:13:01,188 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,188 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,220 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,231 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,247 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,264 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:13:01,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:13:01,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:13:01,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:13:01,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (1/1) ... [2024-06-14 13:13:01,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:13:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:13:01,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:13:01,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:13:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:13:01,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:13:01,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:13:01,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:13:01,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:13:01,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:13:01,343 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:13:01,343 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:13:01,344 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:13:01,344 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:13:01,344 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:13:01,344 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:13:01,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:13:01,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:13:01,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:13:01,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:13:01,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:13:01,351 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:13:01,523 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:13:01,527 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:13:02,261 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:13:02,261 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:13:02,923 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:13:02,923 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:13:02,924 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:13:02 BoogieIcfgContainer [2024-06-14 13:13:02,924 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:13:02,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:13:02,927 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:13:02,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:13:02,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:12:59" (1/4) ... [2024-06-14 13:13:02,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd228a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:13:02, skipping insertion in model container [2024-06-14 13:13:02,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:13:00" (2/4) ... [2024-06-14 13:13:02,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd228a6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:13:02, skipping insertion in model container [2024-06-14 13:13:02,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:01" (3/4) ... [2024-06-14 13:13:02,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd228a6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:13:02, skipping insertion in model container [2024-06-14 13:13:02,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:13:02" (4/4) ... [2024-06-14 13:13:02,933 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_power.opt.i [2024-06-14 13:13:02,950 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:13:02,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:13:02,951 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:13:03,018 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:13:03,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 13:13:03,079 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 13:13:03,079 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:13:03,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:13:03,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 13:13:03,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 13:13:03,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:13:03,098 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@622e937a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:13:03,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:13:03,125 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:13:03,126 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:13:03,126 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:13:03,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:03,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:13:03,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:03,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash 665164879, now seen corresponding path program 1 times [2024-06-14 13:13:03,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:03,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285119057] [2024-06-14 13:13:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:05,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:05,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285119057] [2024-06-14 13:13:05,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285119057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:05,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:05,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:13:05,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594754092] [2024-06-14 13:13:05,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:05,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:13:05,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:05,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:13:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:13:05,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:05,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:05,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:05,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:05,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:06,485 INFO L124 PetriNetUnfolderBase]: 1412/2150 cut-off events. [2024-06-14 13:13:06,486 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 13:13:06,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4354 conditions, 2150 events. 1412/2150 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10291 event pairs, 956 based on Foata normal form. 1/2115 useless extension candidates. Maximal degree in co-relation 4339. Up to 2115 conditions per place. [2024-06-14 13:13:06,507 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 38 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-06-14 13:13:06,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 193 flow [2024-06-14 13:13:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:13:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:13:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-14 13:13:06,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-14 13:13:06,521 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 69 transitions. [2024-06-14 13:13:06,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 193 flow [2024-06-14 13:13:06,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:06,526 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 13:13:06,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 13:13:06,530 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 13:13:06,530 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 13:13:06,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:06,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:06,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:06,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:13:06,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:06,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash -726638194, now seen corresponding path program 1 times [2024-06-14 13:13:06,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:06,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210899495] [2024-06-14 13:13:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:08,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:08,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210899495] [2024-06-14 13:13:08,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210899495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:08,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:08,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:13:08,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835707602] [2024-06-14 13:13:08,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:08,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:13:08,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:08,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:13:08,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:13:08,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:08,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:08,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:08,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:08,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:09,204 INFO L124 PetriNetUnfolderBase]: 1400/2132 cut-off events. [2024-06-14 13:13:09,204 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-14 13:13:09,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4878 conditions, 2132 events. 1400/2132 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10191 event pairs, 654 based on Foata normal form. 6/2136 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-14 13:13:09,220 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 48 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-14 13:13:09,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 272 flow [2024-06-14 13:13:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:13:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:13:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-14 13:13:09,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-14 13:13:09,224 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 90 transitions. [2024-06-14 13:13:09,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 272 flow [2024-06-14 13:13:09,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:13:09,228 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 13:13:09,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-14 13:13:09,232 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 13:13:09,232 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 13:13:09,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:09,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:09,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:09,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:13:09,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:09,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1574176780, now seen corresponding path program 1 times [2024-06-14 13:13:09,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:09,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528382498] [2024-06-14 13:13:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:09,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:13,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:13,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528382498] [2024-06-14 13:13:13,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528382498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:13,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:13,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:13:13,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802257137] [2024-06-14 13:13:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:13,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:13:13,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:13:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:13:13,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:13,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:13,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:13,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:13,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:14,125 INFO L124 PetriNetUnfolderBase]: 1391/2117 cut-off events. [2024-06-14 13:13:14,125 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-14 13:13:14,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5386 conditions, 2117 events. 1391/2117 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10061 event pairs, 485 based on Foata normal form. 6/2121 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-14 13:13:14,141 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-14 13:13:14,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 390 flow [2024-06-14 13:13:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-14 13:13:14,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 13:13:14,148 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 6 states and 124 transitions. [2024-06-14 13:13:14,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 390 flow [2024-06-14 13:13:14,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 370 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:14,152 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 185 flow [2024-06-14 13:13:14,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-14 13:13:14,153 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2024-06-14 13:13:14,154 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 185 flow [2024-06-14 13:13:14,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:14,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:14,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:14,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:13:14,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:14,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:14,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1153664149, now seen corresponding path program 1 times [2024-06-14 13:13:14,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:14,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480633258] [2024-06-14 13:13:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:14,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:16,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:16,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480633258] [2024-06-14 13:13:16,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480633258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:16,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:16,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:13:16,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108750226] [2024-06-14 13:13:16,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:16,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:13:16,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:16,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:13:16,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:13:16,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:16,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:16,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:16,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:16,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:17,166 INFO L124 PetriNetUnfolderBase]: 1386/2111 cut-off events. [2024-06-14 13:13:17,166 INFO L125 PetriNetUnfolderBase]: For 2156/2156 co-relation queries the response was YES. [2024-06-14 13:13:17,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5898 conditions, 2111 events. 1386/2111 cut-off events. For 2156/2156 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10013 event pairs, 572 based on Foata normal form. 2/2109 useless extension candidates. Maximal degree in co-relation 5879. Up to 2036 conditions per place. [2024-06-14 13:13:17,184 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 52 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-14 13:13:17,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 391 flow [2024-06-14 13:13:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:13:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:13:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-14 13:13:17,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:13:17,186 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 185 flow. Second operand 5 states and 95 transitions. [2024-06-14 13:13:17,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 391 flow [2024-06-14 13:13:17,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 68 transitions, 364 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:17,194 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 232 flow [2024-06-14 13:13:17,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 13:13:17,195 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-14 13:13:17,195 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 232 flow [2024-06-14 13:13:17,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:17,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:17,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:17,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:13:17,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:17,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:17,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1389041437, now seen corresponding path program 1 times [2024-06-14 13:13:17,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:17,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156179125] [2024-06-14 13:13:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:17,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:18,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:18,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156179125] [2024-06-14 13:13:18,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156179125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:18,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:18,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:13:18,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299063731] [2024-06-14 13:13:18,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:18,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:13:18,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:18,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:13:18,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:13:18,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:18,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:18,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:18,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:18,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:19,884 INFO L124 PetriNetUnfolderBase]: 1376/2097 cut-off events. [2024-06-14 13:13:19,885 INFO L125 PetriNetUnfolderBase]: For 3363/3366 co-relation queries the response was YES. [2024-06-14 13:13:19,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6457 conditions, 2097 events. 1376/2097 cut-off events. For 3363/3366 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9908 event pairs, 566 based on Foata normal form. 6/2100 useless extension candidates. Maximal degree in co-relation 6435. Up to 2028 conditions per place. [2024-06-14 13:13:19,899 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 51 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 13:13:19,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 390 flow [2024-06-14 13:13:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:13:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:13:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-14 13:13:19,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-14 13:13:19,910 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 232 flow. Second operand 5 states and 93 transitions. [2024-06-14 13:13:19,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 390 flow [2024-06-14 13:13:19,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 376 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 13:13:19,917 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 246 flow [2024-06-14 13:13:19,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-14 13:13:19,920 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 13:13:19,920 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 246 flow [2024-06-14 13:13:19,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:19,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:19,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:19,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:13:19,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:19,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1966167792, now seen corresponding path program 1 times [2024-06-14 13:13:19,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:19,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004958513] [2024-06-14 13:13:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:19,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:22,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:22,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004958513] [2024-06-14 13:13:22,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004958513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:22,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:22,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:22,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730604636] [2024-06-14 13:13:22,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:22,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:22,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:22,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:22,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:22,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:22,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:22,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:22,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:23,193 INFO L124 PetriNetUnfolderBase]: 1389/2123 cut-off events. [2024-06-14 13:13:23,194 INFO L125 PetriNetUnfolderBase]: For 4396/4396 co-relation queries the response was YES. [2024-06-14 13:13:23,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6771 conditions, 2123 events. 1389/2123 cut-off events. For 4396/4396 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10147 event pairs, 523 based on Foata normal form. 2/2120 useless extension candidates. Maximal degree in co-relation 6746. Up to 1956 conditions per place. [2024-06-14 13:13:23,205 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 62 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-06-14 13:13:23,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 530 flow [2024-06-14 13:13:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 13:13:23,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-14 13:13:23,207 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 246 flow. Second operand 6 states and 119 transitions. [2024-06-14 13:13:23,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 530 flow [2024-06-14 13:13:23,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 516 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:23,212 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 330 flow [2024-06-14 13:13:23,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-06-14 13:13:23,213 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-14 13:13:23,213 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 330 flow [2024-06-14 13:13:23,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:23,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:23,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:23,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:13:23,214 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:23,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:23,215 INFO L85 PathProgramCache]: Analyzing trace with hash -111137140, now seen corresponding path program 2 times [2024-06-14 13:13:23,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:23,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999381734] [2024-06-14 13:13:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:23,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:25,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:25,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999381734] [2024-06-14 13:13:25,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999381734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:25,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:25,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:25,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056842090] [2024-06-14 13:13:25,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:25,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:25,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:25,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:25,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:25,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 330 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:25,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:25,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:25,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:26,440 INFO L124 PetriNetUnfolderBase]: 1384/2109 cut-off events. [2024-06-14 13:13:26,440 INFO L125 PetriNetUnfolderBase]: For 6466/6466 co-relation queries the response was YES. [2024-06-14 13:13:26,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 2109 events. 1384/2109 cut-off events. For 6466/6466 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10045 event pairs, 537 based on Foata normal form. 2/2102 useless extension candidates. Maximal degree in co-relation 7390. Up to 1953 conditions per place. [2024-06-14 13:13:26,454 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 56 selfloop transitions, 21 changer transitions 0/82 dead transitions. [2024-06-14 13:13:26,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 586 flow [2024-06-14 13:13:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 13:13:26,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-14 13:13:26,456 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 330 flow. Second operand 6 states and 113 transitions. [2024-06-14 13:13:26,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 586 flow [2024-06-14 13:13:26,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 556 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:26,465 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 378 flow [2024-06-14 13:13:26,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2024-06-14 13:13:26,466 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-14 13:13:26,466 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 378 flow [2024-06-14 13:13:26,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:26,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:26,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:26,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:13:26,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:26,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1900798754, now seen corresponding path program 1 times [2024-06-14 13:13:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:26,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249596728] [2024-06-14 13:13:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:26,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249596728] [2024-06-14 13:13:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249596728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:28,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:28,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098524764] [2024-06-14 13:13:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:28,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:28,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:28,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:28,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:28,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:29,013 INFO L124 PetriNetUnfolderBase]: 1471/2249 cut-off events. [2024-06-14 13:13:29,014 INFO L125 PetriNetUnfolderBase]: For 8390/8392 co-relation queries the response was YES. [2024-06-14 13:13:29,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 2249 events. 1471/2249 cut-off events. For 8390/8392 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10752 event pairs, 524 based on Foata normal form. 6/2250 useless extension candidates. Maximal degree in co-relation 8311. Up to 2020 conditions per place. [2024-06-14 13:13:29,023 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 73 selfloop transitions, 34 changer transitions 0/112 dead transitions. [2024-06-14 13:13:29,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 866 flow [2024-06-14 13:13:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 13:13:29,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-14 13:13:29,026 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 378 flow. Second operand 7 states and 142 transitions. [2024-06-14 13:13:29,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 866 flow [2024-06-14 13:13:29,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 802 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:29,033 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 564 flow [2024-06-14 13:13:29,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=564, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-14 13:13:29,034 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-14 13:13:29,034 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 564 flow [2024-06-14 13:13:29,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:29,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:29,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:29,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:13:29,035 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:29,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:29,036 INFO L85 PathProgramCache]: Analyzing trace with hash -685021502, now seen corresponding path program 2 times [2024-06-14 13:13:29,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:29,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819383220] [2024-06-14 13:13:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:29,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:30,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:30,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819383220] [2024-06-14 13:13:30,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819383220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:30,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:30,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:30,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972655655] [2024-06-14 13:13:30,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:30,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:30,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:30,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:30,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 564 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:30,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:30,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:30,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:32,115 INFO L124 PetriNetUnfolderBase]: 1515/2327 cut-off events. [2024-06-14 13:13:32,115 INFO L125 PetriNetUnfolderBase]: For 10873/10877 co-relation queries the response was YES. [2024-06-14 13:13:32,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9060 conditions, 2327 events. 1515/2327 cut-off events. For 10873/10877 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11241 event pairs, 531 based on Foata normal form. 10/2332 useless extension candidates. Maximal degree in co-relation 9026. Up to 2058 conditions per place. [2024-06-14 13:13:32,128 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 65 selfloop transitions, 40 changer transitions 0/110 dead transitions. [2024-06-14 13:13:32,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 954 flow [2024-06-14 13:13:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 13:13:32,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:13:32,131 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 564 flow. Second operand 6 states and 120 transitions. [2024-06-14 13:13:32,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 954 flow [2024-06-14 13:13:32,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 110 transitions, 904 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:32,146 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 681 flow [2024-06-14 13:13:32,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=681, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-14 13:13:32,148 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-14 13:13:32,148 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 681 flow [2024-06-14 13:13:32,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:32,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:32,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:32,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:13:32,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:32,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash 857769250, now seen corresponding path program 3 times [2024-06-14 13:13:32,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324964190] [2024-06-14 13:13:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:32,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:34,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324964190] [2024-06-14 13:13:34,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324964190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:34,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:34,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:34,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371078321] [2024-06-14 13:13:34,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:34,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:34,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:34,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:34,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 681 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:34,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:34,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:34,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:35,365 INFO L124 PetriNetUnfolderBase]: 1499/2299 cut-off events. [2024-06-14 13:13:35,365 INFO L125 PetriNetUnfolderBase]: For 12935/12953 co-relation queries the response was YES. [2024-06-14 13:13:35,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9167 conditions, 2299 events. 1499/2299 cut-off events. For 12935/12953 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11085 event pairs, 536 based on Foata normal form. 18/2305 useless extension candidates. Maximal degree in co-relation 9132. Up to 2045 conditions per place. [2024-06-14 13:13:35,376 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 60 selfloop transitions, 39 changer transitions 0/104 dead transitions. [2024-06-14 13:13:35,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 945 flow [2024-06-14 13:13:35,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:13:35,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 13:13:35,379 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 681 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:13:35,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 945 flow [2024-06-14 13:13:35,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 870 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:35,391 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 695 flow [2024-06-14 13:13:35,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=695, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-14 13:13:35,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-14 13:13:35,392 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 695 flow [2024-06-14 13:13:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:35,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:35,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:35,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:13:35,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:35,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:35,394 INFO L85 PathProgramCache]: Analyzing trace with hash 849995070, now seen corresponding path program 1 times [2024-06-14 13:13:35,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:35,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970008640] [2024-06-14 13:13:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:35,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:38,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:38,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970008640] [2024-06-14 13:13:38,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970008640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:38,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:38,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:38,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777291177] [2024-06-14 13:13:38,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:38,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:38,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:38,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:38,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:38,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:38,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 695 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:38,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:38,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:38,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:39,363 INFO L124 PetriNetUnfolderBase]: 1491/2292 cut-off events. [2024-06-14 13:13:39,363 INFO L125 PetriNetUnfolderBase]: For 12881/12884 co-relation queries the response was YES. [2024-06-14 13:13:39,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9090 conditions, 2292 events. 1491/2292 cut-off events. For 12881/12884 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11000 event pairs, 525 based on Foata normal form. 6/2295 useless extension candidates. Maximal degree in co-relation 9055. Up to 2175 conditions per place. [2024-06-14 13:13:39,375 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 88 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2024-06-14 13:13:39,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 971 flow [2024-06-14 13:13:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 13:13:39,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128787878787879 [2024-06-14 13:13:39,378 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 695 flow. Second operand 6 states and 109 transitions. [2024-06-14 13:13:39,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 971 flow [2024-06-14 13:13:39,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 802 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:13:39,391 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 579 flow [2024-06-14 13:13:39,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=579, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-14 13:13:39,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-14 13:13:39,392 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 579 flow [2024-06-14 13:13:39,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:39,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:39,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:39,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:13:39,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:39,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:39,393 INFO L85 PathProgramCache]: Analyzing trace with hash 293666703, now seen corresponding path program 1 times [2024-06-14 13:13:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:39,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731263880] [2024-06-14 13:13:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:42,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731263880] [2024-06-14 13:13:42,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731263880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:42,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:42,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125034655] [2024-06-14 13:13:42,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:42,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:42,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:42,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:42,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:42,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:42,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:42,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:43,869 INFO L124 PetriNetUnfolderBase]: 1540/2367 cut-off events. [2024-06-14 13:13:43,869 INFO L125 PetriNetUnfolderBase]: For 13307/13307 co-relation queries the response was YES. [2024-06-14 13:13:43,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9443 conditions, 2367 events. 1540/2367 cut-off events. For 13307/13307 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11454 event pairs, 521 based on Foata normal form. 2/2367 useless extension candidates. Maximal degree in co-relation 9409. Up to 2209 conditions per place. [2024-06-14 13:13:43,882 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 106 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-06-14 13:13:43,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 130 transitions, 1033 flow [2024-06-14 13:13:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:13:43,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:13:43,885 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 579 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:13:43,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 130 transitions, 1033 flow [2024-06-14 13:13:43,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 998 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:43,898 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 652 flow [2024-06-14 13:13:43,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=652, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-14 13:13:43,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-14 13:13:43,899 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 652 flow [2024-06-14 13:13:43,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:43,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:43,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:43,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:13:43,900 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:43,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash 298428303, now seen corresponding path program 2 times [2024-06-14 13:13:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:43,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174285875] [2024-06-14 13:13:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:43,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:46,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:46,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174285875] [2024-06-14 13:13:46,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174285875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:46,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:46,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:46,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889984170] [2024-06-14 13:13:46,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:46,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:46,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:46,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:46,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:46,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 652 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:46,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:46,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:46,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:48,166 INFO L124 PetriNetUnfolderBase]: 1553/2394 cut-off events. [2024-06-14 13:13:48,166 INFO L125 PetriNetUnfolderBase]: For 16537/16537 co-relation queries the response was YES. [2024-06-14 13:13:48,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10167 conditions, 2394 events. 1553/2394 cut-off events. For 16537/16537 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11757 event pairs, 479 based on Foata normal form. 2/2391 useless extension candidates. Maximal degree in co-relation 10131. Up to 1935 conditions per place. [2024-06-14 13:13:48,181 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 80 selfloop transitions, 45 changer transitions 0/130 dead transitions. [2024-06-14 13:13:48,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 1112 flow [2024-06-14 13:13:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 13:13:48,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 13:13:48,184 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 652 flow. Second operand 7 states and 137 transitions. [2024-06-14 13:13:48,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 1112 flow [2024-06-14 13:13:48,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 1053 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:48,209 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 793 flow [2024-06-14 13:13:48,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=793, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2024-06-14 13:13:48,210 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-14 13:13:48,210 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 793 flow [2024-06-14 13:13:48,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:48,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:48,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:48,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:13:48,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:48,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash 820807705, now seen corresponding path program 3 times [2024-06-14 13:13:48,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:48,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46537622] [2024-06-14 13:13:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:48,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:50,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:50,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46537622] [2024-06-14 13:13:50,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46537622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:50,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:50,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:50,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559848486] [2024-06-14 13:13:50,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:50,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:50,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:50,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:50,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:50,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:50,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 793 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:50,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:50,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:50,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:52,277 INFO L124 PetriNetUnfolderBase]: 1548/2375 cut-off events. [2024-06-14 13:13:52,277 INFO L125 PetriNetUnfolderBase]: For 20150/20150 co-relation queries the response was YES. [2024-06-14 13:13:52,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10941 conditions, 2375 events. 1548/2375 cut-off events. For 20150/20150 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11584 event pairs, 536 based on Foata normal form. 2/2353 useless extension candidates. Maximal degree in co-relation 10904. Up to 1932 conditions per place. [2024-06-14 13:13:52,292 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 72 selfloop transitions, 50 changer transitions 0/127 dead transitions. [2024-06-14 13:13:52,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 127 transitions, 1207 flow [2024-06-14 13:13:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:13:52,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 13:13:52,295 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 793 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:13:52,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 127 transitions, 1207 flow [2024-06-14 13:13:52,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1146 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:52,315 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 883 flow [2024-06-14 13:13:52,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=883, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-14 13:13:52,316 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 13:13:52,316 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 883 flow [2024-06-14 13:13:52,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:52,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:52,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:52,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:13:52,317 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:52,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash 858510391, now seen corresponding path program 1 times [2024-06-14 13:13:52,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:52,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116928160] [2024-06-14 13:13:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:52,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:54,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:54,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116928160] [2024-06-14 13:13:54,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116928160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:54,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:13:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847384515] [2024-06-14 13:13:54,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:54,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:13:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:54,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:13:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:13:54,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:54,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 883 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:54,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:54,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:54,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:55,562 INFO L124 PetriNetUnfolderBase]: 1545/2384 cut-off events. [2024-06-14 13:13:55,562 INFO L125 PetriNetUnfolderBase]: For 21579/21579 co-relation queries the response was YES. [2024-06-14 13:13:55,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11060 conditions, 2384 events. 1545/2384 cut-off events. For 21579/21579 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11651 event pairs, 528 based on Foata normal form. 1/2383 useless extension candidates. Maximal degree in co-relation 11021. Up to 2306 conditions per place. [2024-06-14 13:13:55,577 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 99 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-14 13:13:55,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 1143 flow [2024-06-14 13:13:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:13:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:13:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-14 13:13:55,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-14 13:13:55,579 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 883 flow. Second operand 5 states and 86 transitions. [2024-06-14 13:13:55,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 1143 flow [2024-06-14 13:13:55,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 1057 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:55,607 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 843 flow [2024-06-14 13:13:55,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=843, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-14 13:13:55,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-14 13:13:55,609 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 843 flow [2024-06-14 13:13:55,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:55,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:55,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:55,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:13:55,610 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:55,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1323417949, now seen corresponding path program 1 times [2024-06-14 13:13:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:55,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929096916] [2024-06-14 13:13:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:58,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:58,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929096916] [2024-06-14 13:13:58,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929096916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:58,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:58,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:58,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518610872] [2024-06-14 13:13:58,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:58,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:58,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:58,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:58,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:58,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:58,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:58,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:59,454 INFO L124 PetriNetUnfolderBase]: 1535/2367 cut-off events. [2024-06-14 13:13:59,455 INFO L125 PetriNetUnfolderBase]: For 23602/23602 co-relation queries the response was YES. [2024-06-14 13:13:59,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11124 conditions, 2367 events. 1535/2367 cut-off events. For 23602/23602 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11588 event pairs, 516 based on Foata normal form. 4/2369 useless extension candidates. Maximal degree in co-relation 11083. Up to 2209 conditions per place. [2024-06-14 13:13:59,464 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 116 selfloop transitions, 19 changer transitions 0/140 dead transitions. [2024-06-14 13:13:59,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 1223 flow [2024-06-14 13:13:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:13:59,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:13:59,467 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 843 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:13:59,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 1223 flow [2024-06-14 13:13:59,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 140 transitions, 1189 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:59,490 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 855 flow [2024-06-14 13:13:59,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-06-14 13:13:59,492 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 13:13:59,492 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 855 flow [2024-06-14 13:13:59,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:59,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:59,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:59,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:13:59,494 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:59,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1374650817, now seen corresponding path program 2 times [2024-06-14 13:13:59,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:59,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769488565] [2024-06-14 13:13:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:59,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:02,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:02,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769488565] [2024-06-14 13:14:02,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769488565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:02,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:02,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:02,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496486570] [2024-06-14 13:14:02,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:02,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:02,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:02,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:02,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:02,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:02,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 855 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:02,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:02,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:02,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:04,039 INFO L124 PetriNetUnfolderBase]: 1561/2419 cut-off events. [2024-06-14 13:14:04,039 INFO L125 PetriNetUnfolderBase]: For 26531/26531 co-relation queries the response was YES. [2024-06-14 13:14:04,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11572 conditions, 2419 events. 1561/2419 cut-off events. For 26531/26531 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11893 event pairs, 483 based on Foata normal form. 4/2418 useless extension candidates. Maximal degree in co-relation 11530. Up to 1942 conditions per place. [2024-06-14 13:14:04,048 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 50 changer transitions 0/144 dead transitions. [2024-06-14 13:14:04,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 144 transitions, 1339 flow [2024-06-14 13:14:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:14:04,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:14:04,050 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 855 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:14:04,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 144 transitions, 1339 flow [2024-06-14 13:14:04,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1301 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:04,066 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 963 flow [2024-06-14 13:14:04,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=963, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-14 13:14:04,067 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-14 13:14:04,067 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 963 flow [2024-06-14 13:14:04,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:04,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:04,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:04,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:14:04,068 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:04,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:04,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1175600959, now seen corresponding path program 3 times [2024-06-14 13:14:04,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:04,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771598453] [2024-06-14 13:14:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:04,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:06,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:06,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771598453] [2024-06-14 13:14:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771598453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:06,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388057615] [2024-06-14 13:14:06,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:06,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:06,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 963 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:06,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:06,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:06,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:07,992 INFO L124 PetriNetUnfolderBase]: 1623/2522 cut-off events. [2024-06-14 13:14:07,992 INFO L125 PetriNetUnfolderBase]: For 31287/31291 co-relation queries the response was YES. [2024-06-14 13:14:07,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12501 conditions, 2522 events. 1623/2522 cut-off events. For 31287/31291 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12563 event pairs, 474 based on Foata normal form. 8/2525 useless extension candidates. Maximal degree in co-relation 12458. Up to 1994 conditions per place. [2024-06-14 13:14:08,004 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 85 selfloop transitions, 58 changer transitions 0/148 dead transitions. [2024-06-14 13:14:08,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 148 transitions, 1563 flow [2024-06-14 13:14:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 13:14:08,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 13:14:08,007 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 963 flow. Second operand 7 states and 141 transitions. [2024-06-14 13:14:08,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 148 transitions, 1563 flow [2024-06-14 13:14:08,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 1431 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:08,074 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 1045 flow [2024-06-14 13:14:08,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1045, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-14 13:14:08,075 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-14 13:14:08,075 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 1045 flow [2024-06-14 13:14:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:08,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:08,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:08,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:14:08,076 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:08,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:08,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1175593023, now seen corresponding path program 1 times [2024-06-14 13:14:08,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:08,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121185563] [2024-06-14 13:14:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:08,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:10,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:10,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121185563] [2024-06-14 13:14:10,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121185563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:10,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:10,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:10,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585234565] [2024-06-14 13:14:10,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:10,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:10,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:10,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:10,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:10,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 1045 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:10,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:10,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:10,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:12,199 INFO L124 PetriNetUnfolderBase]: 1643/2554 cut-off events. [2024-06-14 13:14:12,199 INFO L125 PetriNetUnfolderBase]: For 34325/34329 co-relation queries the response was YES. [2024-06-14 13:14:12,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12777 conditions, 2554 events. 1643/2554 cut-off events. For 34325/34329 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12730 event pairs, 485 based on Foata normal form. 8/2557 useless extension candidates. Maximal degree in co-relation 12733. Up to 2226 conditions per place. [2024-06-14 13:14:12,212 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 98 selfloop transitions, 42 changer transitions 0/145 dead transitions. [2024-06-14 13:14:12,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 145 transitions, 1435 flow [2024-06-14 13:14:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 13:14:12,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 13:14:12,215 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 1045 flow. Second operand 7 states and 134 transitions. [2024-06-14 13:14:12,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 145 transitions, 1435 flow [2024-06-14 13:14:12,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 145 transitions, 1359 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:14:12,242 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1086 flow [2024-06-14 13:14:12,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1086, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-06-14 13:14:12,243 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-14 13:14:12,243 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1086 flow [2024-06-14 13:14:12,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:12,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:12,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:12,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:14:12,244 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:12,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash 792009085, now seen corresponding path program 4 times [2024-06-14 13:14:12,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:12,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464326680] [2024-06-14 13:14:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:12,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:14,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464326680] [2024-06-14 13:14:14,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464326680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:14,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:14,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:14,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65691586] [2024-06-14 13:14:14,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:14,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:14,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:14,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:14,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:14,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:14,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1086 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:14,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:14,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:14,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:16,078 INFO L124 PetriNetUnfolderBase]: 1633/2524 cut-off events. [2024-06-14 13:14:16,078 INFO L125 PetriNetUnfolderBase]: For 37848/37860 co-relation queries the response was YES. [2024-06-14 13:14:16,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12903 conditions, 2524 events. 1633/2524 cut-off events. For 37848/37860 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12595 event pairs, 507 based on Foata normal form. 12/2518 useless extension candidates. Maximal degree in co-relation 12858. Up to 2018 conditions per place. [2024-06-14 13:14:16,089 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 82 selfloop transitions, 56 changer transitions 0/143 dead transitions. [2024-06-14 13:14:16,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 143 transitions, 1518 flow [2024-06-14 13:14:16,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 13:14:16,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:14:16,091 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1086 flow. Second operand 7 states and 133 transitions. [2024-06-14 13:14:16,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 143 transitions, 1518 flow [2024-06-14 13:14:16,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 143 transitions, 1417 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:16,129 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1106 flow [2024-06-14 13:14:16,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1106, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-14 13:14:16,129 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-14 13:14:16,130 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1106 flow [2024-06-14 13:14:16,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:16,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:16,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:14:16,130 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:16,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash 535301185, now seen corresponding path program 5 times [2024-06-14 13:14:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:16,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081671548] [2024-06-14 13:14:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:16,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:19,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:19,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081671548] [2024-06-14 13:14:19,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081671548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:19,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:19,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:19,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759955157] [2024-06-14 13:14:19,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:19,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:19,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:19,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:19,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:19,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1106 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:19,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:19,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:19,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:20,796 INFO L124 PetriNetUnfolderBase]: 1623/2505 cut-off events. [2024-06-14 13:14:20,796 INFO L125 PetriNetUnfolderBase]: For 40703/40703 co-relation queries the response was YES. [2024-06-14 13:14:20,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12990 conditions, 2505 events. 1623/2505 cut-off events. For 40703/40703 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12406 event pairs, 562 based on Foata normal form. 4/2483 useless extension candidates. Maximal degree in co-relation 12944. Up to 2010 conditions per place. [2024-06-14 13:14:20,809 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 81 selfloop transitions, 59 changer transitions 0/145 dead transitions. [2024-06-14 13:14:20,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 145 transitions, 1480 flow [2024-06-14 13:14:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:14:20,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:14:20,812 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1106 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:14:20,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 145 transitions, 1480 flow [2024-06-14 13:14:20,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 145 transitions, 1276 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:20,842 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 1028 flow [2024-06-14 13:14:20,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1028, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-14 13:14:20,842 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-14 13:14:20,843 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 1028 flow [2024-06-14 13:14:20,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:20,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:20,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:20,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:14:20,843 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:20,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash -918913853, now seen corresponding path program 2 times [2024-06-14 13:14:20,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:20,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255575213] [2024-06-14 13:14:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:20,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:23,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:23,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255575213] [2024-06-14 13:14:23,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255575213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:23,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:23,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:23,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195858692] [2024-06-14 13:14:23,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:23,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:23,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:23,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:23,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:23,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:23,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:23,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:23,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:24,882 INFO L124 PetriNetUnfolderBase]: 1643/2558 cut-off events. [2024-06-14 13:14:24,882 INFO L125 PetriNetUnfolderBase]: For 42645/42657 co-relation queries the response was YES. [2024-06-14 13:14:24,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13220 conditions, 2558 events. 1643/2558 cut-off events. For 42645/42657 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12782 event pairs, 496 based on Foata normal form. 12/2558 useless extension candidates. Maximal degree in co-relation 13174. Up to 2236 conditions per place. [2024-06-14 13:14:24,894 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 97 selfloop transitions, 41 changer transitions 0/143 dead transitions. [2024-06-14 13:14:24,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1410 flow [2024-06-14 13:14:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:14:24,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 13:14:24,896 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 1028 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:14:24,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1410 flow [2024-06-14 13:14:24,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 143 transitions, 1177 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 13:14:24,924 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 913 flow [2024-06-14 13:14:24,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=913, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2024-06-14 13:14:24,925 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-14 13:14:24,925 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 913 flow [2024-06-14 13:14:24,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:24,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:24,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:24,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:14:24,925 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:24,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:24,926 INFO L85 PathProgramCache]: Analyzing trace with hash 801540221, now seen corresponding path program 3 times [2024-06-14 13:14:24,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:24,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328574544] [2024-06-14 13:14:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:24,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:27,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:27,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328574544] [2024-06-14 13:14:27,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328574544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:27,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:27,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:27,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127943073] [2024-06-14 13:14:27,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:27,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:27,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:27,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:27,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 913 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:27,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:27,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:27,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:28,709 INFO L124 PetriNetUnfolderBase]: 1635/2552 cut-off events. [2024-06-14 13:14:28,710 INFO L125 PetriNetUnfolderBase]: For 44708/44720 co-relation queries the response was YES. [2024-06-14 13:14:28,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12999 conditions, 2552 events. 1635/2552 cut-off events. For 44708/44720 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12810 event pairs, 468 based on Foata normal form. 12/2552 useless extension candidates. Maximal degree in co-relation 12955. Up to 2142 conditions per place. [2024-06-14 13:14:28,721 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 94 selfloop transitions, 46 changer transitions 0/145 dead transitions. [2024-06-14 13:14:28,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 145 transitions, 1301 flow [2024-06-14 13:14:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:14:28,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 13:14:28,723 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 913 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:14:28,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 145 transitions, 1301 flow [2024-06-14 13:14:28,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 145 transitions, 1203 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:28,748 INFO L231 Difference]: Finished difference. Result has 101 places, 117 transitions, 946 flow [2024-06-14 13:14:28,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=946, PETRI_PLACES=101, PETRI_TRANSITIONS=117} [2024-06-14 13:14:28,749 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-14 13:14:28,749 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 117 transitions, 946 flow [2024-06-14 13:14:28,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:28,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:28,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:28,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:14:28,750 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:28,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash 804696365, now seen corresponding path program 1 times [2024-06-14 13:14:28,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:28,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924860053] [2024-06-14 13:14:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:28,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:31,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:31,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924860053] [2024-06-14 13:14:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924860053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:31,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:31,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:31,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855506834] [2024-06-14 13:14:31,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:31,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:31,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:31,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:31,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 117 transitions, 946 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:31,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:31,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:31,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:32,300 INFO L124 PetriNetUnfolderBase]: 1657/2571 cut-off events. [2024-06-14 13:14:32,301 INFO L125 PetriNetUnfolderBase]: For 48708/48708 co-relation queries the response was YES. [2024-06-14 13:14:32,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13380 conditions, 2571 events. 1657/2571 cut-off events. For 48708/48708 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12756 event pairs, 529 based on Foata normal form. 6/2567 useless extension candidates. Maximal degree in co-relation 13335. Up to 2356 conditions per place. [2024-06-14 13:14:32,314 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 117 selfloop transitions, 20 changer transitions 0/142 dead transitions. [2024-06-14 13:14:32,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1376 flow [2024-06-14 13:14:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:14:32,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:14:32,315 INFO L175 Difference]: Start difference. First operand has 101 places, 117 transitions, 946 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:14:32,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1376 flow [2024-06-14 13:14:32,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1263 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:32,380 INFO L231 Difference]: Finished difference. Result has 103 places, 125 transitions, 952 flow [2024-06-14 13:14:32,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=952, PETRI_PLACES=103, PETRI_TRANSITIONS=125} [2024-06-14 13:14:32,380 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-14 13:14:32,381 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 125 transitions, 952 flow [2024-06-14 13:14:32,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:32,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:32,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:32,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:14:32,381 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:32,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:32,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2116639158, now seen corresponding path program 1 times [2024-06-14 13:14:32,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:32,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143590337] [2024-06-14 13:14:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:32,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:34,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:34,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143590337] [2024-06-14 13:14:34,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143590337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:34,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:34,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:34,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094979779] [2024-06-14 13:14:34,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:34,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:34,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:34,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:34,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:34,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 125 transitions, 952 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:34,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:34,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:34,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:35,802 INFO L124 PetriNetUnfolderBase]: 1905/2989 cut-off events. [2024-06-14 13:14:35,802 INFO L125 PetriNetUnfolderBase]: For 59635/59635 co-relation queries the response was YES. [2024-06-14 13:14:35,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16049 conditions, 2989 events. 1905/2989 cut-off events. For 59635/59635 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15514 event pairs, 584 based on Foata normal form. 4/2991 useless extension candidates. Maximal degree in co-relation 16002. Up to 2445 conditions per place. [2024-06-14 13:14:35,817 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 167 selfloop transitions, 34 changer transitions 0/206 dead transitions. [2024-06-14 13:14:35,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 206 transitions, 1777 flow [2024-06-14 13:14:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:14:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:14:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-14 13:14:35,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43388429752066116 [2024-06-14 13:14:35,819 INFO L175 Difference]: Start difference. First operand has 103 places, 125 transitions, 952 flow. Second operand 11 states and 210 transitions. [2024-06-14 13:14:35,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 206 transitions, 1777 flow [2024-06-14 13:14:35,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 206 transitions, 1741 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:14:35,865 INFO L231 Difference]: Finished difference. Result has 115 places, 141 transitions, 1161 flow [2024-06-14 13:14:35,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1161, PETRI_PLACES=115, PETRI_TRANSITIONS=141} [2024-06-14 13:14:35,866 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-14 13:14:35,866 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 141 transitions, 1161 flow [2024-06-14 13:14:35,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:35,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:35,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:35,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:14:35,866 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:35,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1920856936, now seen corresponding path program 2 times [2024-06-14 13:14:35,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:35,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318709481] [2024-06-14 13:14:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:38,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318709481] [2024-06-14 13:14:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318709481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:38,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:38,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098641033] [2024-06-14 13:14:38,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:38,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:38,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:38,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 141 transitions, 1161 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:38,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:38,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:38,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:40,574 INFO L124 PetriNetUnfolderBase]: 2077/3269 cut-off events. [2024-06-14 13:14:40,574 INFO L125 PetriNetUnfolderBase]: For 75739/75739 co-relation queries the response was YES. [2024-06-14 13:14:40,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18668 conditions, 3269 events. 2077/3269 cut-off events. For 75739/75739 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17484 event pairs, 488 based on Foata normal form. 4/3271 useless extension candidates. Maximal degree in co-relation 18616. Up to 2411 conditions per place. [2024-06-14 13:14:40,592 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 154 selfloop transitions, 36 changer transitions 0/195 dead transitions. [2024-06-14 13:14:40,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 195 transitions, 1885 flow [2024-06-14 13:14:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:14:40,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 13:14:40,594 INFO L175 Difference]: Start difference. First operand has 115 places, 141 transitions, 1161 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:14:40,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 195 transitions, 1885 flow [2024-06-14 13:14:40,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 195 transitions, 1823 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:40,645 INFO L231 Difference]: Finished difference. Result has 120 places, 144 transitions, 1249 flow [2024-06-14 13:14:40,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1249, PETRI_PLACES=120, PETRI_TRANSITIONS=144} [2024-06-14 13:14:40,646 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-14 13:14:40,646 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 144 transitions, 1249 flow [2024-06-14 13:14:40,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:40,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:40,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:40,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:14:40,646 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:40,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:40,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1923713896, now seen corresponding path program 3 times [2024-06-14 13:14:40,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:40,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141914200] [2024-06-14 13:14:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:40,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:43,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:43,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141914200] [2024-06-14 13:14:43,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141914200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:43,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:43,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:43,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134185845] [2024-06-14 13:14:43,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:43,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:43,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:43,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:43,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:43,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 144 transitions, 1249 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:43,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:43,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:43,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:45,203 INFO L124 PetriNetUnfolderBase]: 2061/3243 cut-off events. [2024-06-14 13:14:45,203 INFO L125 PetriNetUnfolderBase]: For 80516/80516 co-relation queries the response was YES. [2024-06-14 13:14:45,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18793 conditions, 3243 events. 2061/3243 cut-off events. For 80516/80516 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17358 event pairs, 640 based on Foata normal form. 8/3249 useless extension candidates. Maximal degree in co-relation 18739. Up to 2963 conditions per place. [2024-06-14 13:14:45,222 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 156 selfloop transitions, 30 changer transitions 0/191 dead transitions. [2024-06-14 13:14:45,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 1841 flow [2024-06-14 13:14:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:14:45,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 13:14:45,224 INFO L175 Difference]: Start difference. First operand has 120 places, 144 transitions, 1249 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:14:45,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 1841 flow [2024-06-14 13:14:45,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 191 transitions, 1759 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:45,273 INFO L231 Difference]: Finished difference. Result has 124 places, 147 transitions, 1309 flow [2024-06-14 13:14:45,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1309, PETRI_PLACES=124, PETRI_TRANSITIONS=147} [2024-06-14 13:14:45,274 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-14 13:14:45,274 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 147 transitions, 1309 flow [2024-06-14 13:14:45,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:45,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:45,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:45,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:14:45,274 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:45,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash -973141490, now seen corresponding path program 4 times [2024-06-14 13:14:45,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:45,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317789967] [2024-06-14 13:14:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:45,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:48,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:48,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317789967] [2024-06-14 13:14:48,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317789967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:48,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:48,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:48,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566113299] [2024-06-14 13:14:48,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:48,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:48,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:48,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:48,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 147 transitions, 1309 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:48,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:48,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:48,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:49,802 INFO L124 PetriNetUnfolderBase]: 2081/3281 cut-off events. [2024-06-14 13:14:49,803 INFO L125 PetriNetUnfolderBase]: For 79336/79336 co-relation queries the response was YES. [2024-06-14 13:14:49,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19017 conditions, 3281 events. 2081/3281 cut-off events. For 79336/79336 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17564 event pairs, 537 based on Foata normal form. 4/3280 useless extension candidates. Maximal degree in co-relation 18961. Up to 2686 conditions per place. [2024-06-14 13:14:49,822 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 115 selfloop transitions, 66 changer transitions 0/186 dead transitions. [2024-06-14 13:14:49,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 186 transitions, 1842 flow [2024-06-14 13:14:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:14:49,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:14:49,824 INFO L175 Difference]: Start difference. First operand has 124 places, 147 transitions, 1309 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:14:49,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 186 transitions, 1842 flow [2024-06-14 13:14:49,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 186 transitions, 1741 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:49,878 INFO L231 Difference]: Finished difference. Result has 125 places, 149 transitions, 1393 flow [2024-06-14 13:14:49,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1393, PETRI_PLACES=125, PETRI_TRANSITIONS=149} [2024-06-14 13:14:49,879 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-14 13:14:49,879 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 149 transitions, 1393 flow [2024-06-14 13:14:49,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:49,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:49,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:49,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:14:49,880 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:49,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -836609330, now seen corresponding path program 1 times [2024-06-14 13:14:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:49,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197960956] [2024-06-14 13:14:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:52,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:52,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197960956] [2024-06-14 13:14:52,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197960956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:52,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:52,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:52,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42940765] [2024-06-14 13:14:52,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:52,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:52,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:52,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:52,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 149 transitions, 1393 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:52,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:52,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:52,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:53,683 INFO L124 PetriNetUnfolderBase]: 2091/3294 cut-off events. [2024-06-14 13:14:53,683 INFO L125 PetriNetUnfolderBase]: For 84759/84759 co-relation queries the response was YES. [2024-06-14 13:14:53,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19407 conditions, 3294 events. 2091/3294 cut-off events. For 84759/84759 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17645 event pairs, 606 based on Foata normal form. 2/3294 useless extension candidates. Maximal degree in co-relation 19350. Up to 3039 conditions per place. [2024-06-14 13:14:53,704 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 146 selfloop transitions, 26 changer transitions 0/177 dead transitions. [2024-06-14 13:14:53,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 177 transitions, 1919 flow [2024-06-14 13:14:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 13:14:53,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 13:14:53,706 INFO L175 Difference]: Start difference. First operand has 125 places, 149 transitions, 1393 flow. Second operand 6 states and 117 transitions. [2024-06-14 13:14:53,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 177 transitions, 1919 flow [2024-06-14 13:14:53,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1752 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:53,767 INFO L231 Difference]: Finished difference. Result has 125 places, 152 transitions, 1315 flow [2024-06-14 13:14:53,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1315, PETRI_PLACES=125, PETRI_TRANSITIONS=152} [2024-06-14 13:14:53,768 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-14 13:14:53,768 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 152 transitions, 1315 flow [2024-06-14 13:14:53,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:53,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:53,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:53,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:14:53,769 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:53,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash -365827224, now seen corresponding path program 5 times [2024-06-14 13:14:53,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:53,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853182036] [2024-06-14 13:14:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:56,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:56,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853182036] [2024-06-14 13:14:56,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853182036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:56,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:56,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630358386] [2024-06-14 13:14:56,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:56,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:56,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:56,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:56,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 152 transitions, 1315 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:56,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:56,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:56,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:58,332 INFO L124 PetriNetUnfolderBase]: 2083/3262 cut-off events. [2024-06-14 13:14:58,332 INFO L125 PetriNetUnfolderBase]: For 87415/87415 co-relation queries the response was YES. [2024-06-14 13:14:58,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19042 conditions, 3262 events. 2083/3262 cut-off events. For 87415/87415 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17385 event pairs, 627 based on Foata normal form. 4/3237 useless extension candidates. Maximal degree in co-relation 18984. Up to 2688 conditions per place. [2024-06-14 13:14:58,349 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 113 selfloop transitions, 69 changer transitions 0/187 dead transitions. [2024-06-14 13:14:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 187 transitions, 1842 flow [2024-06-14 13:14:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:14:58,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-14 13:14:58,350 INFO L175 Difference]: Start difference. First operand has 125 places, 152 transitions, 1315 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:14:58,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 187 transitions, 1842 flow [2024-06-14 13:14:58,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 187 transitions, 1801 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:14:58,403 INFO L231 Difference]: Finished difference. Result has 130 places, 154 transitions, 1469 flow [2024-06-14 13:14:58,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1469, PETRI_PLACES=130, PETRI_TRANSITIONS=154} [2024-06-14 13:14:58,404 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-14 13:14:58,404 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 154 transitions, 1469 flow [2024-06-14 13:14:58,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:58,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:58,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:14:58,405 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:58,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash -824229170, now seen corresponding path program 2 times [2024-06-14 13:14:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:58,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819033934] [2024-06-14 13:14:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:58,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:00,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:00,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819033934] [2024-06-14 13:15:00,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819033934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:00,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:00,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:15:00,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782945031] [2024-06-14 13:15:00,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:00,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:15:00,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:00,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:15:00,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:15:00,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:00,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 154 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:00,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:00,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:00,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:02,218 INFO L124 PetriNetUnfolderBase]: 2057/3231 cut-off events. [2024-06-14 13:15:02,219 INFO L125 PetriNetUnfolderBase]: For 93489/93489 co-relation queries the response was YES. [2024-06-14 13:15:02,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19266 conditions, 3231 events. 2057/3231 cut-off events. For 93489/93489 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17121 event pairs, 587 based on Foata normal form. 6/3224 useless extension candidates. Maximal degree in co-relation 19207. Up to 3008 conditions per place. [2024-06-14 13:15:02,243 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 140 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-14 13:15:02,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 170 transitions, 1865 flow [2024-06-14 13:15:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:15:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:15:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:15:02,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053030303030303 [2024-06-14 13:15:02,245 INFO L175 Difference]: Start difference. First operand has 130 places, 154 transitions, 1469 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:15:02,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 170 transitions, 1865 flow [2024-06-14 13:15:02,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 170 transitions, 1676 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:02,307 INFO L231 Difference]: Finished difference. Result has 130 places, 154 transitions, 1338 flow [2024-06-14 13:15:02,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1338, PETRI_PLACES=130, PETRI_TRANSITIONS=154} [2024-06-14 13:15:02,307 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-14 13:15:02,307 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 154 transitions, 1338 flow [2024-06-14 13:15:02,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:02,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:02,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:02,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:15:02,308 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:02,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:02,308 INFO L85 PathProgramCache]: Analyzing trace with hash -829936146, now seen corresponding path program 1 times [2024-06-14 13:15:02,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:02,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583446173] [2024-06-14 13:15:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:02,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:04,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583446173] [2024-06-14 13:15:04,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583446173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:04,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:04,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:15:04,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635920612] [2024-06-14 13:15:04,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:04,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:15:04,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:04,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:15:04,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:15:04,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:04,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 154 transitions, 1338 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:04,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:04,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:04,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:05,892 INFO L124 PetriNetUnfolderBase]: 2062/3261 cut-off events. [2024-06-14 13:15:05,892 INFO L125 PetriNetUnfolderBase]: For 94219/94219 co-relation queries the response was YES. [2024-06-14 13:15:05,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19075 conditions, 3261 events. 2062/3261 cut-off events. For 94219/94219 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17571 event pairs, 645 based on Foata normal form. 1/3258 useless extension candidates. Maximal degree in co-relation 19015. Up to 3079 conditions per place. [2024-06-14 13:15:05,913 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 155 selfloop transitions, 21 changer transitions 0/181 dead transitions. [2024-06-14 13:15:05,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 181 transitions, 1968 flow [2024-06-14 13:15:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:15:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:15:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:15:05,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:15:05,915 INFO L175 Difference]: Start difference. First operand has 130 places, 154 transitions, 1338 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:15:05,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 181 transitions, 1968 flow [2024-06-14 13:15:05,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 181 transitions, 1893 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:05,975 INFO L231 Difference]: Finished difference. Result has 131 places, 163 transitions, 1437 flow [2024-06-14 13:15:05,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1437, PETRI_PLACES=131, PETRI_TRANSITIONS=163} [2024-06-14 13:15:05,976 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-14 13:15:05,976 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 163 transitions, 1437 flow [2024-06-14 13:15:05,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:05,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:05,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:05,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:15:05,977 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:05,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:05,977 INFO L85 PathProgramCache]: Analyzing trace with hash 435043344, now seen corresponding path program 2 times [2024-06-14 13:15:05,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:05,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289115646] [2024-06-14 13:15:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:05,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:08,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289115646] [2024-06-14 13:15:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289115646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:08,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:08,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:15:08,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50200961] [2024-06-14 13:15:08,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:08,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:15:08,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:08,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:15:08,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:15:08,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:08,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 163 transitions, 1437 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:08,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:08,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:08,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:09,643 INFO L124 PetriNetUnfolderBase]: 2075/3274 cut-off events. [2024-06-14 13:15:09,643 INFO L125 PetriNetUnfolderBase]: For 100494/100494 co-relation queries the response was YES. [2024-06-14 13:15:09,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19704 conditions, 3274 events. 2075/3274 cut-off events. For 100494/100494 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17610 event pairs, 669 based on Foata normal form. 1/3273 useless extension candidates. Maximal degree in co-relation 19642. Up to 3141 conditions per place. [2024-06-14 13:15:09,660 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 161 selfloop transitions, 14 changer transitions 0/180 dead transitions. [2024-06-14 13:15:09,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 1922 flow [2024-06-14 13:15:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:15:09,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 13:15:09,661 INFO L175 Difference]: Start difference. First operand has 131 places, 163 transitions, 1437 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:15:09,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 1922 flow [2024-06-14 13:15:09,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 180 transitions, 1850 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-14 13:15:09,741 INFO L231 Difference]: Finished difference. Result has 138 places, 166 transitions, 1442 flow [2024-06-14 13:15:09,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1442, PETRI_PLACES=138, PETRI_TRANSITIONS=166} [2024-06-14 13:15:09,742 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-14 13:15:09,742 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 166 transitions, 1442 flow [2024-06-14 13:15:09,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:09,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:09,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:09,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:15:09,742 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:09,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:09,742 INFO L85 PathProgramCache]: Analyzing trace with hash -582974844, now seen corresponding path program 1 times [2024-06-14 13:15:09,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:09,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987001619] [2024-06-14 13:15:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:09,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:12,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:12,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987001619] [2024-06-14 13:15:12,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987001619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:12,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:12,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:12,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786741111] [2024-06-14 13:15:12,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:12,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:12,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:12,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:12,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:12,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 166 transitions, 1442 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:12,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:12,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:12,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:14,525 INFO L124 PetriNetUnfolderBase]: 2211/3508 cut-off events. [2024-06-14 13:15:14,525 INFO L125 PetriNetUnfolderBase]: For 121872/121872 co-relation queries the response was YES. [2024-06-14 13:15:14,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20733 conditions, 3508 events. 2211/3508 cut-off events. For 121872/121872 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19218 event pairs, 474 based on Foata normal form. 32/3538 useless extension candidates. Maximal degree in co-relation 20667. Up to 2462 conditions per place. [2024-06-14 13:15:14,546 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 177 selfloop transitions, 39 changer transitions 0/221 dead transitions. [2024-06-14 13:15:14,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 221 transitions, 2217 flow [2024-06-14 13:15:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:15:14,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:15:14,548 INFO L175 Difference]: Start difference. First operand has 138 places, 166 transitions, 1442 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:15:14,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 221 transitions, 2217 flow [2024-06-14 13:15:14,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 221 transitions, 2179 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:15:14,627 INFO L231 Difference]: Finished difference. Result has 142 places, 168 transitions, 1540 flow [2024-06-14 13:15:14,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1540, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2024-06-14 13:15:14,627 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 97 predicate places. [2024-06-14 13:15:14,628 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1540 flow [2024-06-14 13:15:14,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:14,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:14,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:14,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:15:14,628 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:14,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:14,628 INFO L85 PathProgramCache]: Analyzing trace with hash -494261214, now seen corresponding path program 2 times [2024-06-14 13:15:14,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:14,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156463422] [2024-06-14 13:15:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:14,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:17,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:17,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156463422] [2024-06-14 13:15:17,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156463422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:17,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:17,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:17,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629585224] [2024-06-14 13:15:17,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:17,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:17,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:17,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:17,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:17,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1540 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:17,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:17,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:17,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:19,124 INFO L124 PetriNetUnfolderBase]: 2139/3391 cut-off events. [2024-06-14 13:15:19,124 INFO L125 PetriNetUnfolderBase]: For 114492/114492 co-relation queries the response was YES. [2024-06-14 13:15:19,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19531 conditions, 3391 events. 2139/3391 cut-off events. For 114492/114492 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18410 event pairs, 604 based on Foata normal form. 40/3429 useless extension candidates. Maximal degree in co-relation 19464. Up to 2858 conditions per place. [2024-06-14 13:15:19,142 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 182 selfloop transitions, 29 changer transitions 0/216 dead transitions. [2024-06-14 13:15:19,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 216 transitions, 2133 flow [2024-06-14 13:15:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:15:19,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 13:15:19,144 INFO L175 Difference]: Start difference. First operand has 142 places, 168 transitions, 1540 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:15:19,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 216 transitions, 2133 flow [2024-06-14 13:15:19,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 216 transitions, 2023 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:19,244 INFO L231 Difference]: Finished difference. Result has 145 places, 168 transitions, 1498 flow [2024-06-14 13:15:19,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1498, PETRI_PLACES=145, PETRI_TRANSITIONS=168} [2024-06-14 13:15:19,244 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-14 13:15:19,244 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 168 transitions, 1498 flow [2024-06-14 13:15:19,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:19,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:19,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:19,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:15:19,245 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:19,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -942310822, now seen corresponding path program 3 times [2024-06-14 13:15:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33389125] [2024-06-14 13:15:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:22,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:22,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33389125] [2024-06-14 13:15:22,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33389125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:22,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:22,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397245225] [2024-06-14 13:15:22,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:22,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:22,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:22,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:22,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:22,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 168 transitions, 1498 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:22,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:22,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:22,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:24,643 INFO L124 PetriNetUnfolderBase]: 2227/3544 cut-off events. [2024-06-14 13:15:24,644 INFO L125 PetriNetUnfolderBase]: For 111461/111461 co-relation queries the response was YES. [2024-06-14 13:15:24,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19939 conditions, 3544 events. 2227/3544 cut-off events. For 111461/111461 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19501 event pairs, 527 based on Foata normal form. 20/3559 useless extension candidates. Maximal degree in co-relation 19871. Up to 2821 conditions per place. [2024-06-14 13:15:24,663 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 146 selfloop transitions, 65 changer transitions 0/216 dead transitions. [2024-06-14 13:15:24,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 216 transitions, 2115 flow [2024-06-14 13:15:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:15:24,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:15:24,665 INFO L175 Difference]: Start difference. First operand has 145 places, 168 transitions, 1498 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:15:24,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 216 transitions, 2115 flow [2024-06-14 13:15:24,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 216 transitions, 2016 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:15:24,749 INFO L231 Difference]: Finished difference. Result has 145 places, 169 transitions, 1566 flow [2024-06-14 13:15:24,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1566, PETRI_PLACES=145, PETRI_TRANSITIONS=169} [2024-06-14 13:15:24,750 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-14 13:15:24,750 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 169 transitions, 1566 flow [2024-06-14 13:15:24,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:24,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:24,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:24,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:15:24,751 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:24,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash 180580894, now seen corresponding path program 4 times [2024-06-14 13:15:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:24,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106939531] [2024-06-14 13:15:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:24,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:28,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:28,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106939531] [2024-06-14 13:15:28,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106939531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:28,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:28,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:28,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909177174] [2024-06-14 13:15:28,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:28,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:28,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:28,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:28,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 169 transitions, 1566 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:28,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:28,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:28,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:30,027 INFO L124 PetriNetUnfolderBase]: 2295/3660 cut-off events. [2024-06-14 13:15:30,028 INFO L125 PetriNetUnfolderBase]: For 117106/117106 co-relation queries the response was YES. [2024-06-14 13:15:30,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20646 conditions, 3660 events. 2295/3660 cut-off events. For 117106/117106 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20362 event pairs, 511 based on Foata normal form. 16/3671 useless extension candidates. Maximal degree in co-relation 20577. Up to 2803 conditions per place. [2024-06-14 13:15:30,050 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 153 selfloop transitions, 68 changer transitions 0/226 dead transitions. [2024-06-14 13:15:30,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 226 transitions, 2235 flow [2024-06-14 13:15:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 13:15:30,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:15:30,052 INFO L175 Difference]: Start difference. First operand has 145 places, 169 transitions, 1566 flow. Second operand 10 states and 190 transitions. [2024-06-14 13:15:30,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 226 transitions, 2235 flow [2024-06-14 13:15:30,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 226 transitions, 2086 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:30,152 INFO L231 Difference]: Finished difference. Result has 148 places, 170 transitions, 1591 flow [2024-06-14 13:15:30,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1591, PETRI_PLACES=148, PETRI_TRANSITIONS=170} [2024-06-14 13:15:30,153 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-14 13:15:30,153 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 170 transitions, 1591 flow [2024-06-14 13:15:30,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:30,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:30,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:30,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:15:30,154 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:30,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:30,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1209839860, now seen corresponding path program 5 times [2024-06-14 13:15:30,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:30,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037077522] [2024-06-14 13:15:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:30,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:33,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037077522] [2024-06-14 13:15:33,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037077522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:33,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:33,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:33,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065496269] [2024-06-14 13:15:33,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:33,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:33,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:33,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 170 transitions, 1591 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:33,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:33,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:33,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:34,869 INFO L124 PetriNetUnfolderBase]: 2383/3826 cut-off events. [2024-06-14 13:15:34,869 INFO L125 PetriNetUnfolderBase]: For 126118/126122 co-relation queries the response was YES. [2024-06-14 13:15:34,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21409 conditions, 3826 events. 2383/3826 cut-off events. For 126118/126122 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21751 event pairs, 539 based on Foata normal form. 24/3845 useless extension candidates. Maximal degree in co-relation 21339. Up to 3085 conditions per place. [2024-06-14 13:15:34,893 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 143 selfloop transitions, 66 changer transitions 0/214 dead transitions. [2024-06-14 13:15:34,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 214 transitions, 2192 flow [2024-06-14 13:15:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:15:34,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 13:15:34,896 INFO L175 Difference]: Start difference. First operand has 148 places, 170 transitions, 1591 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:15:34,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 214 transitions, 2192 flow [2024-06-14 13:15:34,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 214 transitions, 2030 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:34,988 INFO L231 Difference]: Finished difference. Result has 148 places, 171 transitions, 1602 flow [2024-06-14 13:15:34,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1602, PETRI_PLACES=148, PETRI_TRANSITIONS=171} [2024-06-14 13:15:34,989 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-14 13:15:34,989 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 171 transitions, 1602 flow [2024-06-14 13:15:34,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:34,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:34,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:34,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:15:34,989 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:34,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash -369778800, now seen corresponding path program 1 times [2024-06-14 13:15:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:34,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790871767] [2024-06-14 13:15:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:34,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:38,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:38,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790871767] [2024-06-14 13:15:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790871767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:38,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:38,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:38,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178871376] [2024-06-14 13:15:38,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:38,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:38,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:38,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:38,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:38,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 171 transitions, 1602 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:38,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:38,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:38,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:40,596 INFO L124 PetriNetUnfolderBase]: 2555/4114 cut-off events. [2024-06-14 13:15:40,596 INFO L125 PetriNetUnfolderBase]: For 142671/142675 co-relation queries the response was YES. [2024-06-14 13:15:40,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23494 conditions, 4114 events. 2555/4114 cut-off events. For 142671/142675 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23847 event pairs, 581 based on Foata normal form. 16/4125 useless extension candidates. Maximal degree in co-relation 23423. Up to 2627 conditions per place. [2024-06-14 13:15:40,695 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 145 selfloop transitions, 70 changer transitions 0/220 dead transitions. [2024-06-14 13:15:40,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 220 transitions, 2397 flow [2024-06-14 13:15:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 13:15:40,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 13:15:40,696 INFO L175 Difference]: Start difference. First operand has 148 places, 171 transitions, 1602 flow. Second operand 8 states and 159 transitions. [2024-06-14 13:15:40,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 220 transitions, 2397 flow [2024-06-14 13:15:40,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 220 transitions, 2242 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:40,787 INFO L231 Difference]: Finished difference. Result has 150 places, 173 transitions, 1663 flow [2024-06-14 13:15:40,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1663, PETRI_PLACES=150, PETRI_TRANSITIONS=173} [2024-06-14 13:15:40,787 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-14 13:15:40,788 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 173 transitions, 1663 flow [2024-06-14 13:15:40,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:40,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:40,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:40,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:15:40,788 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:40,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:40,789 INFO L85 PathProgramCache]: Analyzing trace with hash -971568576, now seen corresponding path program 6 times [2024-06-14 13:15:40,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:40,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247799054] [2024-06-14 13:15:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:40,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:43,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247799054] [2024-06-14 13:15:43,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247799054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:43,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:43,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:43,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615566355] [2024-06-14 13:15:43,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:43,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:43,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:43,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:43,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:44,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:44,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 173 transitions, 1663 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:44,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:44,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:44,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:46,049 INFO L124 PetriNetUnfolderBase]: 2519/4026 cut-off events. [2024-06-14 13:15:46,049 INFO L125 PetriNetUnfolderBase]: For 140941/140941 co-relation queries the response was YES. [2024-06-14 13:15:46,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 4026 events. 2519/4026 cut-off events. For 140941/140941 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23132 event pairs, 674 based on Foata normal form. 20/4019 useless extension candidates. Maximal degree in co-relation 22477. Up to 3317 conditions per place. [2024-06-14 13:15:46,076 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 143 selfloop transitions, 68 changer transitions 0/216 dead transitions. [2024-06-14 13:15:46,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 216 transitions, 2240 flow [2024-06-14 13:15:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:15:46,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:15:46,078 INFO L175 Difference]: Start difference. First operand has 150 places, 173 transitions, 1663 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:15:46,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 216 transitions, 2240 flow [2024-06-14 13:15:46,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 2119 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:15:46,217 INFO L231 Difference]: Finished difference. Result has 155 places, 173 transitions, 1685 flow [2024-06-14 13:15:46,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1685, PETRI_PLACES=155, PETRI_TRANSITIONS=173} [2024-06-14 13:15:46,217 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-14 13:15:46,217 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 173 transitions, 1685 flow [2024-06-14 13:15:46,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:46,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:46,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:46,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:15:46,218 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:46,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:46,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1707058340, now seen corresponding path program 7 times [2024-06-14 13:15:46,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:46,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104475496] [2024-06-14 13:15:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:46,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:49,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:49,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104475496] [2024-06-14 13:15:49,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104475496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:49,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:49,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:49,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554762561] [2024-06-14 13:15:49,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:49,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:49,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:49,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:49,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:49,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 173 transitions, 1685 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:49,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:49,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:49,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:51,693 INFO L124 PetriNetUnfolderBase]: 2587/4142 cut-off events. [2024-06-14 13:15:51,693 INFO L125 PetriNetUnfolderBase]: For 143714/143714 co-relation queries the response was YES. [2024-06-14 13:15:51,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23235 conditions, 4142 events. 2587/4142 cut-off events. For 143714/143714 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23962 event pairs, 658 based on Foata normal form. 16/4131 useless extension candidates. Maximal degree in co-relation 23161. Up to 3299 conditions per place. [2024-06-14 13:15:51,720 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 150 selfloop transitions, 71 changer transitions 0/226 dead transitions. [2024-06-14 13:15:51,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 226 transitions, 2348 flow [2024-06-14 13:15:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:15:51,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 13:15:51,722 INFO L175 Difference]: Start difference. First operand has 155 places, 173 transitions, 1685 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:15:51,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 226 transitions, 2348 flow [2024-06-14 13:15:51,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 226 transitions, 2187 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:51,854 INFO L231 Difference]: Finished difference. Result has 157 places, 174 transitions, 1710 flow [2024-06-14 13:15:51,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1710, PETRI_PLACES=157, PETRI_TRANSITIONS=174} [2024-06-14 13:15:51,854 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-14 13:15:51,854 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 174 transitions, 1710 flow [2024-06-14 13:15:51,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:51,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:51,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:51,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:15:51,855 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:51,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1477538106, now seen corresponding path program 8 times [2024-06-14 13:15:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:51,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453031250] [2024-06-14 13:15:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:51,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:54,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:54,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453031250] [2024-06-14 13:15:54,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453031250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:54,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:54,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:54,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213266232] [2024-06-14 13:15:54,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:54,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:54,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:54,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:54,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:54,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 174 transitions, 1710 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:54,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:54,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:54,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:56,723 INFO L124 PetriNetUnfolderBase]: 2619/4230 cut-off events. [2024-06-14 13:15:56,723 INFO L125 PetriNetUnfolderBase]: For 149592/149604 co-relation queries the response was YES. [2024-06-14 13:15:56,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23370 conditions, 4230 events. 2619/4230 cut-off events. For 149592/149604 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24858 event pairs, 636 based on Foata normal form. 28/4238 useless extension candidates. Maximal degree in co-relation 23295. Up to 3493 conditions per place. [2024-06-14 13:15:56,751 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 145 selfloop transitions, 64 changer transitions 0/214 dead transitions. [2024-06-14 13:15:56,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 214 transitions, 2305 flow [2024-06-14 13:15:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:15:56,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:15:56,753 INFO L175 Difference]: Start difference. First operand has 157 places, 174 transitions, 1710 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:15:56,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 214 transitions, 2305 flow [2024-06-14 13:15:56,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 214 transitions, 2131 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:56,868 INFO L231 Difference]: Finished difference. Result has 157 places, 175 transitions, 1711 flow [2024-06-14 13:15:56,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1711, PETRI_PLACES=157, PETRI_TRANSITIONS=175} [2024-06-14 13:15:56,868 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-14 13:15:56,869 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 175 transitions, 1711 flow [2024-06-14 13:15:56,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:56,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:56,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:56,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:15:56,869 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:56,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1167373342, now seen corresponding path program 2 times [2024-06-14 13:15:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:56,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201928766] [2024-06-14 13:15:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:56,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:00,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201928766] [2024-06-14 13:16:00,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201928766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:00,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:00,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:00,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434559724] [2024-06-14 13:16:00,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:00,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:00,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:00,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:00,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:00,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 175 transitions, 1711 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:00,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:00,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:00,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:02,343 INFO L124 PetriNetUnfolderBase]: 2667/4326 cut-off events. [2024-06-14 13:16:02,343 INFO L125 PetriNetUnfolderBase]: For 150671/150683 co-relation queries the response was YES. [2024-06-14 13:16:02,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23731 conditions, 4326 events. 2667/4326 cut-off events. For 150671/150683 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25645 event pairs, 636 based on Foata normal form. 20/4326 useless extension candidates. Maximal degree in co-relation 23655. Up to 3467 conditions per place. [2024-06-14 13:16:02,367 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 148 selfloop transitions, 65 changer transitions 0/218 dead transitions. [2024-06-14 13:16:02,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 218 transitions, 2334 flow [2024-06-14 13:16:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:16:02,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:16:02,368 INFO L175 Difference]: Start difference. First operand has 157 places, 175 transitions, 1711 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:16:02,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 218 transitions, 2334 flow [2024-06-14 13:16:02,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 218 transitions, 2177 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:02,479 INFO L231 Difference]: Finished difference. Result has 159 places, 176 transitions, 1732 flow [2024-06-14 13:16:02,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1732, PETRI_PLACES=159, PETRI_TRANSITIONS=176} [2024-06-14 13:16:02,480 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-14 13:16:02,480 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 176 transitions, 1732 flow [2024-06-14 13:16:02,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:02,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:02,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:02,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:16:02,480 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:02,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1481072572, now seen corresponding path program 3 times [2024-06-14 13:16:02,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:02,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103074865] [2024-06-14 13:16:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:02,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:05,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:05,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103074865] [2024-06-14 13:16:05,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103074865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:05,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:05,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:05,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822525308] [2024-06-14 13:16:05,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:05,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:05,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:05,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:05,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:05,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:05,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 176 transitions, 1732 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:05,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:05,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:05,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:07,433 INFO L124 PetriNetUnfolderBase]: 2647/4282 cut-off events. [2024-06-14 13:16:07,433 INFO L125 PetriNetUnfolderBase]: For 145664/145676 co-relation queries the response was YES. [2024-06-14 13:16:07,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22958 conditions, 4282 events. 2647/4282 cut-off events. For 145664/145676 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 25280 event pairs, 587 based on Foata normal form. 20/4282 useless extension candidates. Maximal degree in co-relation 22881. Up to 2455 conditions per place. [2024-06-14 13:16:07,465 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 136 selfloop transitions, 75 changer transitions 0/216 dead transitions. [2024-06-14 13:16:07,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 216 transitions, 2233 flow [2024-06-14 13:16:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:16:07,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:16:07,468 INFO L175 Difference]: Start difference. First operand has 159 places, 176 transitions, 1732 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:16:07,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 216 transitions, 2233 flow [2024-06-14 13:16:07,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 216 transitions, 2071 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:07,600 INFO L231 Difference]: Finished difference. Result has 160 places, 175 transitions, 1652 flow [2024-06-14 13:16:07,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1652, PETRI_PLACES=160, PETRI_TRANSITIONS=175} [2024-06-14 13:16:07,601 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 115 predicate places. [2024-06-14 13:16:07,601 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 175 transitions, 1652 flow [2024-06-14 13:16:07,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:07,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:07,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:07,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:16:07,601 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:07,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1156369968, now seen corresponding path program 1 times [2024-06-14 13:16:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:07,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807385954] [2024-06-14 13:16:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:07,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:09,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:09,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807385954] [2024-06-14 13:16:09,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807385954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:09,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:09,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:16:09,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564877127] [2024-06-14 13:16:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:09,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:16:09,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:16:09,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:16:09,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:09,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 175 transitions, 1652 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:09,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:09,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:09,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:11,393 INFO L124 PetriNetUnfolderBase]: 2657/4309 cut-off events. [2024-06-14 13:16:11,393 INFO L125 PetriNetUnfolderBase]: For 143392/143395 co-relation queries the response was YES. [2024-06-14 13:16:11,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23158 conditions, 4309 events. 2657/4309 cut-off events. For 143392/143395 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25563 event pairs, 811 based on Foata normal form. 4/4310 useless extension candidates. Maximal degree in co-relation 23080. Up to 4094 conditions per place. [2024-06-14 13:16:11,417 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 166 selfloop transitions, 25 changer transitions 0/196 dead transitions. [2024-06-14 13:16:11,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 196 transitions, 2213 flow [2024-06-14 13:16:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:16:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:16:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:16:11,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053030303030303 [2024-06-14 13:16:11,419 INFO L175 Difference]: Start difference. First operand has 160 places, 175 transitions, 1652 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:16:11,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 196 transitions, 2213 flow [2024-06-14 13:16:11,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 196 transitions, 1962 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:16:11,518 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1494 flow [2024-06-14 13:16:11,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1494, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-06-14 13:16:11,518 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-14 13:16:11,519 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1494 flow [2024-06-14 13:16:11,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:11,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:11,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:11,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:16:11,519 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:11,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1197111408, now seen corresponding path program 2 times [2024-06-14 13:16:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:11,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726837906] [2024-06-14 13:16:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:11,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:14,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:14,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726837906] [2024-06-14 13:16:14,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726837906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:14,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:14,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:14,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781654751] [2024-06-14 13:16:14,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:14,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:14,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:14,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:14,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:14,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 1494 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:14,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:14,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:14,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:15,812 INFO L124 PetriNetUnfolderBase]: 2651/4313 cut-off events. [2024-06-14 13:16:15,812 INFO L125 PetriNetUnfolderBase]: For 144042/144042 co-relation queries the response was YES. [2024-06-14 13:16:15,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22170 conditions, 4313 events. 2651/4313 cut-off events. For 144042/144042 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25662 event pairs, 819 based on Foata normal form. 2/4311 useless extension candidates. Maximal degree in co-relation 22093. Up to 4089 conditions per place. [2024-06-14 13:16:15,841 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 165 selfloop transitions, 27 changer transitions 0/197 dead transitions. [2024-06-14 13:16:15,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 197 transitions, 2024 flow [2024-06-14 13:16:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:16:15,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 13:16:15,843 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1494 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:16:15,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 197 transitions, 2024 flow [2024-06-14 13:16:15,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 197 transitions, 1944 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:15,980 INFO L231 Difference]: Finished difference. Result has 161 places, 178 transitions, 1474 flow [2024-06-14 13:16:15,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1474, PETRI_PLACES=161, PETRI_TRANSITIONS=178} [2024-06-14 13:16:15,981 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-14 13:16:15,981 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 178 transitions, 1474 flow [2024-06-14 13:16:15,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:15,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:15,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:16:15,982 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:15,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:15,982 INFO L85 PathProgramCache]: Analyzing trace with hash 41785390, now seen corresponding path program 1 times [2024-06-14 13:16:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:15,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458031575] [2024-06-14 13:16:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:15,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:19,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:19,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458031575] [2024-06-14 13:16:19,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458031575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:19,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:19,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:19,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797741869] [2024-06-14 13:16:19,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:19,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:19,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:19,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:19,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:19,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 178 transitions, 1474 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:19,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:19,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:19,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:20,741 INFO L124 PetriNetUnfolderBase]: 2699/4380 cut-off events. [2024-06-14 13:16:20,741 INFO L125 PetriNetUnfolderBase]: For 155623/155623 co-relation queries the response was YES. [2024-06-14 13:16:20,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22786 conditions, 4380 events. 2699/4380 cut-off events. For 155623/155623 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26098 event pairs, 835 based on Foata normal form. 4/4367 useless extension candidates. Maximal degree in co-relation 22709. Up to 3733 conditions per place. [2024-06-14 13:16:20,772 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 166 selfloop transitions, 57 changer transitions 0/228 dead transitions. [2024-06-14 13:16:20,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 228 transitions, 2496 flow [2024-06-14 13:16:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:16:20,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 13:16:20,776 INFO L175 Difference]: Start difference. First operand has 161 places, 178 transitions, 1474 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:16:20,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 228 transitions, 2496 flow [2024-06-14 13:16:20,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 228 transitions, 2394 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:16:20,871 INFO L231 Difference]: Finished difference. Result has 161 places, 197 transitions, 1748 flow [2024-06-14 13:16:20,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1748, PETRI_PLACES=161, PETRI_TRANSITIONS=197} [2024-06-14 13:16:20,872 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-14 13:16:20,872 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 197 transitions, 1748 flow [2024-06-14 13:16:20,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:20,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:20,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:20,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:16:20,873 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:20,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash 601443730, now seen corresponding path program 3 times [2024-06-14 13:16:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:20,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324738093] [2024-06-14 13:16:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:23,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:23,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324738093] [2024-06-14 13:16:23,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324738093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:23,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:23,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:16:23,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810007930] [2024-06-14 13:16:23,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:23,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:16:23,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:23,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:16:23,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:16:23,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:23,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 197 transitions, 1748 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:23,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:23,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:23,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:24,509 INFO L124 PetriNetUnfolderBase]: 2693/4371 cut-off events. [2024-06-14 13:16:24,509 INFO L125 PetriNetUnfolderBase]: For 159685/159685 co-relation queries the response was YES. [2024-06-14 13:16:24,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23683 conditions, 4371 events. 2693/4371 cut-off events. For 159685/159685 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25994 event pairs, 846 based on Foata normal form. 2/4371 useless extension candidates. Maximal degree in co-relation 23606. Up to 4201 conditions per place. [2024-06-14 13:16:24,543 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 191 selfloop transitions, 14 changer transitions 0/210 dead transitions. [2024-06-14 13:16:24,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 210 transitions, 2198 flow [2024-06-14 13:16:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:16:24,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:16:24,544 INFO L175 Difference]: Start difference. First operand has 161 places, 197 transitions, 1748 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:16:24,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 210 transitions, 2198 flow [2024-06-14 13:16:24,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 210 transitions, 2132 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-14 13:16:24,683 INFO L231 Difference]: Finished difference. Result has 167 places, 197 transitions, 1716 flow [2024-06-14 13:16:24,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1716, PETRI_PLACES=167, PETRI_TRANSITIONS=197} [2024-06-14 13:16:24,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-14 13:16:24,684 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 197 transitions, 1716 flow [2024-06-14 13:16:24,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:24,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:24,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:24,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:16:24,684 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:24,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:24,685 INFO L85 PathProgramCache]: Analyzing trace with hash -645309434, now seen corresponding path program 2 times [2024-06-14 13:16:24,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:24,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810544803] [2024-06-14 13:16:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:24,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:27,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:27,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810544803] [2024-06-14 13:16:27,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810544803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:27,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:27,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:27,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516229055] [2024-06-14 13:16:27,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:27,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:27,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:27,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:27,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 197 transitions, 1716 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:27,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:27,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:27,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:28,958 INFO L124 PetriNetUnfolderBase]: 2883/4614 cut-off events. [2024-06-14 13:16:28,958 INFO L125 PetriNetUnfolderBase]: For 189238/189238 co-relation queries the response was YES. [2024-06-14 13:16:28,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25662 conditions, 4614 events. 2883/4614 cut-off events. For 189238/189238 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27181 event pairs, 732 based on Foata normal form. 6/4607 useless extension candidates. Maximal degree in co-relation 25582. Up to 4111 conditions per place. [2024-06-14 13:16:28,989 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 184 selfloop transitions, 50 changer transitions 0/239 dead transitions. [2024-06-14 13:16:28,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 239 transitions, 2675 flow [2024-06-14 13:16:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:16:28,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-14 13:16:28,991 INFO L175 Difference]: Start difference. First operand has 167 places, 197 transitions, 1716 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:16:28,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 239 transitions, 2675 flow [2024-06-14 13:16:29,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 239 transitions, 2647 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:29,159 INFO L231 Difference]: Finished difference. Result has 171 places, 214 transitions, 2042 flow [2024-06-14 13:16:29,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2042, PETRI_PLACES=171, PETRI_TRANSITIONS=214} [2024-06-14 13:16:29,160 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-14 13:16:29,160 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 214 transitions, 2042 flow [2024-06-14 13:16:29,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:29,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:29,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:29,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:16:29,161 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:29,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash 218923420, now seen corresponding path program 3 times [2024-06-14 13:16:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:29,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856983712] [2024-06-14 13:16:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:29,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:32,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:32,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856983712] [2024-06-14 13:16:32,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856983712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:32,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:32,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157908745] [2024-06-14 13:16:32,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:32,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:32,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:32,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 214 transitions, 2042 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:32,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:32,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:32,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:33,783 INFO L124 PetriNetUnfolderBase]: 2961/4730 cut-off events. [2024-06-14 13:16:33,783 INFO L125 PetriNetUnfolderBase]: For 206649/206649 co-relation queries the response was YES. [2024-06-14 13:16:33,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27870 conditions, 4730 events. 2961/4730 cut-off events. For 206649/206649 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27869 event pairs, 750 based on Foata normal form. 6/4723 useless extension candidates. Maximal degree in co-relation 27787. Up to 4170 conditions per place. [2024-06-14 13:16:33,816 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 185 selfloop transitions, 65 changer transitions 0/255 dead transitions. [2024-06-14 13:16:33,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 255 transitions, 3040 flow [2024-06-14 13:16:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:16:33,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-14 13:16:33,817 INFO L175 Difference]: Start difference. First operand has 171 places, 214 transitions, 2042 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:16:33,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 255 transitions, 3040 flow [2024-06-14 13:16:33,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 255 transitions, 2887 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-14 13:16:33,990 INFO L231 Difference]: Finished difference. Result has 178 places, 229 transitions, 2275 flow [2024-06-14 13:16:33,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2275, PETRI_PLACES=178, PETRI_TRANSITIONS=229} [2024-06-14 13:16:33,990 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-14 13:16:33,990 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 229 transitions, 2275 flow [2024-06-14 13:16:33,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:33,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:33,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:33,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:16:33,991 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:33,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash 219162988, now seen corresponding path program 1 times [2024-06-14 13:16:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:33,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550298321] [2024-06-14 13:16:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:37,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:37,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550298321] [2024-06-14 13:16:37,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550298321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:37,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:37,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:37,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471156929] [2024-06-14 13:16:37,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:37,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:37,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:37,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:37,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 229 transitions, 2275 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:37,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:37,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:37,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:39,171 INFO L124 PetriNetUnfolderBase]: 3000/4795 cut-off events. [2024-06-14 13:16:39,171 INFO L125 PetriNetUnfolderBase]: For 221632/221632 co-relation queries the response was YES. [2024-06-14 13:16:39,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28405 conditions, 4795 events. 3000/4795 cut-off events. For 221632/221632 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28276 event pairs, 770 based on Foata normal form. 14/4796 useless extension candidates. Maximal degree in co-relation 28319. Up to 4464 conditions per place. [2024-06-14 13:16:39,207 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 216 selfloop transitions, 33 changer transitions 0/254 dead transitions. [2024-06-14 13:16:39,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 254 transitions, 2915 flow [2024-06-14 13:16:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:16:39,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 13:16:39,209 INFO L175 Difference]: Start difference. First operand has 178 places, 229 transitions, 2275 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:16:39,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 254 transitions, 2915 flow [2024-06-14 13:16:39,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 254 transitions, 2800 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:39,462 INFO L231 Difference]: Finished difference. Result has 181 places, 231 transitions, 2267 flow [2024-06-14 13:16:39,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2267, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2024-06-14 13:16:39,462 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-14 13:16:39,462 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 2267 flow [2024-06-14 13:16:39,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:39,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:39,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:39,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:16:39,463 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:39,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:39,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1489208821, now seen corresponding path program 1 times [2024-06-14 13:16:39,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:39,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245635311] [2024-06-14 13:16:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:39,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:41,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:41,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245635311] [2024-06-14 13:16:41,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245635311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:41,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:41,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:41,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185763938] [2024-06-14 13:16:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:41,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:41,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:41,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 2267 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:41,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:41,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:41,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:43,813 INFO L124 PetriNetUnfolderBase]: 3061/4919 cut-off events. [2024-06-14 13:16:43,814 INFO L125 PetriNetUnfolderBase]: For 223839/223839 co-relation queries the response was YES. [2024-06-14 13:16:43,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29586 conditions, 4919 events. 3061/4919 cut-off events. For 223839/223839 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29367 event pairs, 841 based on Foata normal form. 1/4915 useless extension candidates. Maximal degree in co-relation 29498. Up to 4093 conditions per place. [2024-06-14 13:16:43,855 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 193 selfloop transitions, 81 changer transitions 0/279 dead transitions. [2024-06-14 13:16:43,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 279 transitions, 3441 flow [2024-06-14 13:16:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 13:16:43,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:16:43,856 INFO L175 Difference]: Start difference. First operand has 181 places, 231 transitions, 2267 flow. Second operand 7 states and 140 transitions. [2024-06-14 13:16:43,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 279 transitions, 3441 flow [2024-06-14 13:16:44,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 279 transitions, 3354 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:44,102 INFO L231 Difference]: Finished difference. Result has 186 places, 247 transitions, 2704 flow [2024-06-14 13:16:44,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2704, PETRI_PLACES=186, PETRI_TRANSITIONS=247} [2024-06-14 13:16:44,102 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-14 13:16:44,103 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 247 transitions, 2704 flow [2024-06-14 13:16:44,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:44,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:44,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:44,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:16:44,103 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:44,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash -822621203, now seen corresponding path program 2 times [2024-06-14 13:16:44,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:44,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163596919] [2024-06-14 13:16:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:44,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:46,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:46,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163596919] [2024-06-14 13:16:46,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163596919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:46,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:46,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685850809] [2024-06-14 13:16:46,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:46,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:46,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:46,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:46,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 247 transitions, 2704 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:46,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:46,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:46,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:48,561 INFO L124 PetriNetUnfolderBase]: 3103/4962 cut-off events. [2024-06-14 13:16:48,561 INFO L125 PetriNetUnfolderBase]: For 241550/241550 co-relation queries the response was YES. [2024-06-14 13:16:48,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31310 conditions, 4962 events. 3103/4962 cut-off events. For 241550/241550 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29503 event pairs, 809 based on Foata normal form. 2/4962 useless extension candidates. Maximal degree in co-relation 31218. Up to 4640 conditions per place. [2024-06-14 13:16:48,598 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 237 selfloop transitions, 45 changer transitions 0/287 dead transitions. [2024-06-14 13:16:48,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 287 transitions, 3714 flow [2024-06-14 13:16:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:16:48,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-14 13:16:48,600 INFO L175 Difference]: Start difference. First operand has 186 places, 247 transitions, 2704 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:16:48,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 287 transitions, 3714 flow [2024-06-14 13:16:48,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 287 transitions, 3664 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-14 13:16:48,841 INFO L231 Difference]: Finished difference. Result has 194 places, 259 transitions, 3000 flow [2024-06-14 13:16:48,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3000, PETRI_PLACES=194, PETRI_TRANSITIONS=259} [2024-06-14 13:16:48,842 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-14 13:16:48,842 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 259 transitions, 3000 flow [2024-06-14 13:16:48,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:48,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:48,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:48,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:16:48,843 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:48,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:48,843 INFO L85 PathProgramCache]: Analyzing trace with hash 166422045, now seen corresponding path program 3 times [2024-06-14 13:16:48,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:48,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658544614] [2024-06-14 13:16:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:48,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:51,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:51,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658544614] [2024-06-14 13:16:51,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658544614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:51,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:51,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:51,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899058474] [2024-06-14 13:16:51,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:51,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:51,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:51,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:51,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:51,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:51,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 259 transitions, 3000 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:51,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:51,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:51,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:53,313 INFO L124 PetriNetUnfolderBase]: 3108/4977 cut-off events. [2024-06-14 13:16:53,313 INFO L125 PetriNetUnfolderBase]: For 249503/249503 co-relation queries the response was YES. [2024-06-14 13:16:53,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31808 conditions, 4977 events. 3108/4977 cut-off events. For 249503/249503 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29634 event pairs, 926 based on Foata normal form. 1/4961 useless extension candidates. Maximal degree in co-relation 31712. Up to 4135 conditions per place. [2024-06-14 13:16:53,351 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 199 selfloop transitions, 86 changer transitions 0/290 dead transitions. [2024-06-14 13:16:53,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 290 transitions, 4022 flow [2024-06-14 13:16:53,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 13:16:53,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:16:53,353 INFO L175 Difference]: Start difference. First operand has 194 places, 259 transitions, 3000 flow. Second operand 7 states and 133 transitions. [2024-06-14 13:16:53,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 290 transitions, 4022 flow [2024-06-14 13:16:53,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 290 transitions, 3880 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:53,611 INFO L231 Difference]: Finished difference. Result has 196 places, 262 transitions, 3095 flow [2024-06-14 13:16:53,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2858, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3095, PETRI_PLACES=196, PETRI_TRANSITIONS=262} [2024-06-14 13:16:53,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-14 13:16:53,611 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 262 transitions, 3095 flow [2024-06-14 13:16:53,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:53,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:53,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:53,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:16:53,612 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:53,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:53,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1295334381, now seen corresponding path program 4 times [2024-06-14 13:16:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:53,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983761653] [2024-06-14 13:16:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:56,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:56,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983761653] [2024-06-14 13:16:56,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983761653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:56,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:56,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:56,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253199768] [2024-06-14 13:16:56,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:56,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:56,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:56,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:56,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:56,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:56,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 262 transitions, 3095 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:56,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:56,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:56,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:58,141 INFO L124 PetriNetUnfolderBase]: 3095/4951 cut-off events. [2024-06-14 13:16:58,141 INFO L125 PetriNetUnfolderBase]: For 259387/259387 co-relation queries the response was YES. [2024-06-14 13:16:58,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31968 conditions, 4951 events. 3095/4951 cut-off events. For 259387/259387 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29457 event pairs, 916 based on Foata normal form. 3/4937 useless extension candidates. Maximal degree in co-relation 31871. Up to 4128 conditions per place. [2024-06-14 13:16:58,183 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 198 selfloop transitions, 83 changer transitions 0/286 dead transitions. [2024-06-14 13:16:58,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 286 transitions, 3939 flow [2024-06-14 13:16:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:16:58,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-14 13:16:58,185 INFO L175 Difference]: Start difference. First operand has 196 places, 262 transitions, 3095 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:16:58,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 286 transitions, 3939 flow [2024-06-14 13:16:58,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 286 transitions, 3742 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:58,557 INFO L231 Difference]: Finished difference. Result has 199 places, 262 transitions, 3072 flow [2024-06-14 13:16:58,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2898, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3072, PETRI_PLACES=199, PETRI_TRANSITIONS=262} [2024-06-14 13:16:58,557 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-14 13:16:58,557 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 262 transitions, 3072 flow [2024-06-14 13:16:58,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:58,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:58,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:58,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:16:58,558 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:58,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1464879503, now seen corresponding path program 5 times [2024-06-14 13:16:58,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:58,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635430461] [2024-06-14 13:16:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:58,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:01,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:01,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635430461] [2024-06-14 13:17:01,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635430461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:01,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:01,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:01,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055891056] [2024-06-14 13:17:01,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:01,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:01,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:01,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:01,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 262 transitions, 3072 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:01,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:01,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:01,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:03,020 INFO L124 PetriNetUnfolderBase]: 3086/4928 cut-off events. [2024-06-14 13:17:03,021 INFO L125 PetriNetUnfolderBase]: For 263730/263730 co-relation queries the response was YES. [2024-06-14 13:17:03,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31721 conditions, 4928 events. 3086/4928 cut-off events. For 263730/263730 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29186 event pairs, 782 based on Foata normal form. 3/4918 useless extension candidates. Maximal degree in co-relation 31624. Up to 4301 conditions per place. [2024-06-14 13:17:03,068 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 206 selfloop transitions, 74 changer transitions 0/285 dead transitions. [2024-06-14 13:17:03,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 285 transitions, 3944 flow [2024-06-14 13:17:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:17:03,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-14 13:17:03,069 INFO L175 Difference]: Start difference. First operand has 199 places, 262 transitions, 3072 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:17:03,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 285 transitions, 3944 flow [2024-06-14 13:17:03,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 285 transitions, 3763 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:03,429 INFO L231 Difference]: Finished difference. Result has 202 places, 262 transitions, 3052 flow [2024-06-14 13:17:03,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3052, PETRI_PLACES=202, PETRI_TRANSITIONS=262} [2024-06-14 13:17:03,430 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 157 predicate places. [2024-06-14 13:17:03,430 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 262 transitions, 3052 flow [2024-06-14 13:17:03,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:03,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:03,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:03,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:17:03,430 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:03,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash -877790493, now seen corresponding path program 6 times [2024-06-14 13:17:03,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:03,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712757530] [2024-06-14 13:17:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:03,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:06,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:06,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712757530] [2024-06-14 13:17:06,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712757530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:06,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:06,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:06,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739974439] [2024-06-14 13:17:06,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:06,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:06,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:06,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:06,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 262 transitions, 3052 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:06,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:06,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:06,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:08,090 INFO L124 PetriNetUnfolderBase]: 3060/4896 cut-off events. [2024-06-14 13:17:08,090 INFO L125 PetriNetUnfolderBase]: For 266814/266814 co-relation queries the response was YES. [2024-06-14 13:17:08,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31112 conditions, 4896 events. 3060/4896 cut-off events. For 266814/266814 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29013 event pairs, 763 based on Foata normal form. 6/4889 useless extension candidates. Maximal degree in co-relation 31014. Up to 4287 conditions per place. [2024-06-14 13:17:08,125 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 208 selfloop transitions, 76 changer transitions 0/289 dead transitions. [2024-06-14 13:17:08,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 289 transitions, 3956 flow [2024-06-14 13:17:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:17:08,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-14 13:17:08,126 INFO L175 Difference]: Start difference. First operand has 202 places, 262 transitions, 3052 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:17:08,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 289 transitions, 3956 flow [2024-06-14 13:17:08,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 289 transitions, 3738 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:08,427 INFO L231 Difference]: Finished difference. Result has 204 places, 262 transitions, 2998 flow [2024-06-14 13:17:08,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2998, PETRI_PLACES=204, PETRI_TRANSITIONS=262} [2024-06-14 13:17:08,428 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-14 13:17:08,428 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 262 transitions, 2998 flow [2024-06-14 13:17:08,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:08,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:08,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:08,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:17:08,428 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:08,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1291624394, now seen corresponding path program 1 times [2024-06-14 13:17:08,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:08,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090686110] [2024-06-14 13:17:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:08,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:11,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:11,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090686110] [2024-06-14 13:17:11,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090686110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:11,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:11,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:11,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078034863] [2024-06-14 13:17:11,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:11,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:11,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:11,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 262 transitions, 2998 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:11,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:11,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:11,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:13,099 INFO L124 PetriNetUnfolderBase]: 3156/5047 cut-off events. [2024-06-14 13:17:13,099 INFO L125 PetriNetUnfolderBase]: For 290143/290155 co-relation queries the response was YES. [2024-06-14 13:17:13,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32363 conditions, 5047 events. 3156/5047 cut-off events. For 290143/290155 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30156 event pairs, 860 based on Foata normal form. 16/5051 useless extension candidates. Maximal degree in co-relation 32264. Up to 4164 conditions per place. [2024-06-14 13:17:13,141 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 207 selfloop transitions, 86 changer transitions 0/298 dead transitions. [2024-06-14 13:17:13,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 298 transitions, 4042 flow [2024-06-14 13:17:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:17:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:17:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:17:13,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:17:13,143 INFO L175 Difference]: Start difference. First operand has 204 places, 262 transitions, 2998 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:17:13,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 298 transitions, 4042 flow [2024-06-14 13:17:13,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 298 transitions, 3772 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 13:17:13,498 INFO L231 Difference]: Finished difference. Result has 202 places, 272 transitions, 3085 flow [2024-06-14 13:17:13,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=202, PETRI_TRANSITIONS=272} [2024-06-14 13:17:13,498 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 157 predicate places. [2024-06-14 13:17:13,498 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 272 transitions, 3085 flow [2024-06-14 13:17:13,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:13,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:13,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:13,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:17:13,499 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:13,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:13,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1544244296, now seen corresponding path program 2 times [2024-06-14 13:17:13,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:13,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421096316] [2024-06-14 13:17:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:13,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:16,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:16,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421096316] [2024-06-14 13:17:16,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421096316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:16,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:16,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:16,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123301998] [2024-06-14 13:17:16,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:16,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:16,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:16,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:16,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 272 transitions, 3085 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:16,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:16,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:16,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:19,347 INFO L124 PetriNetUnfolderBase]: 3196/5107 cut-off events. [2024-06-14 13:17:19,347 INFO L125 PetriNetUnfolderBase]: For 300507/300507 co-relation queries the response was YES. [2024-06-14 13:17:19,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33000 conditions, 5107 events. 3196/5107 cut-off events. For 300507/300507 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30508 event pairs, 923 based on Foata normal form. 8/5098 useless extension candidates. Maximal degree in co-relation 32900. Up to 4188 conditions per place. [2024-06-14 13:17:19,383 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 205 selfloop transitions, 100 changer transitions 0/310 dead transitions. [2024-06-14 13:17:19,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 310 transitions, 4199 flow [2024-06-14 13:17:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:17:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:17:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 13:17:19,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-14 13:17:19,385 INFO L175 Difference]: Start difference. First operand has 202 places, 272 transitions, 3085 flow. Second operand 10 states and 177 transitions. [2024-06-14 13:17:19,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 310 transitions, 4199 flow [2024-06-14 13:17:19,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 310 transitions, 4056 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-14 13:17:19,728 INFO L231 Difference]: Finished difference. Result has 210 places, 276 transitions, 3223 flow [2024-06-14 13:17:19,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3223, PETRI_PLACES=210, PETRI_TRANSITIONS=276} [2024-06-14 13:17:19,728 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-14 13:17:19,728 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 276 transitions, 3223 flow [2024-06-14 13:17:19,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:19,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:19,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:19,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:17:19,729 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:19,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1295343464, now seen corresponding path program 3 times [2024-06-14 13:17:19,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:19,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420375654] [2024-06-14 13:17:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:19,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:22,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:22,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420375654] [2024-06-14 13:17:22,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420375654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:22,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:22,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:22,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662571527] [2024-06-14 13:17:22,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:22,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:22,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:22,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:22,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:22,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 276 transitions, 3223 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:22,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:22,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:22,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:24,998 INFO L124 PetriNetUnfolderBase]: 3180/5081 cut-off events. [2024-06-14 13:17:24,999 INFO L125 PetriNetUnfolderBase]: For 300215/300215 co-relation queries the response was YES. [2024-06-14 13:17:25,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32455 conditions, 5081 events. 3180/5081 cut-off events. For 300215/300215 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30292 event pairs, 917 based on Foata normal form. 8/5072 useless extension candidates. Maximal degree in co-relation 32353. Up to 4184 conditions per place. [2024-06-14 13:17:25,044 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 205 selfloop transitions, 94 changer transitions 0/304 dead transitions. [2024-06-14 13:17:25,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 304 transitions, 4131 flow [2024-06-14 13:17:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:17:25,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 13:17:25,045 INFO L175 Difference]: Start difference. First operand has 210 places, 276 transitions, 3223 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:17:25,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 304 transitions, 4131 flow [2024-06-14 13:17:25,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 304 transitions, 3814 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:25,473 INFO L231 Difference]: Finished difference. Result has 210 places, 276 transitions, 3102 flow [2024-06-14 13:17:25,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3102, PETRI_PLACES=210, PETRI_TRANSITIONS=276} [2024-06-14 13:17:25,473 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-14 13:17:25,474 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 276 transitions, 3102 flow [2024-06-14 13:17:25,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:25,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:25,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:25,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:17:25,474 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:25,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1472245816, now seen corresponding path program 4 times [2024-06-14 13:17:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:25,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094863647] [2024-06-14 13:17:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:25,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:28,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:28,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094863647] [2024-06-14 13:17:28,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094863647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:28,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:28,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:28,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964658140] [2024-06-14 13:17:28,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:28,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:28,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 276 transitions, 3102 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:28,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:28,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:28,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:30,078 INFO L124 PetriNetUnfolderBase]: 3240/5142 cut-off events. [2024-06-14 13:17:30,079 INFO L125 PetriNetUnfolderBase]: For 315229/315229 co-relation queries the response was YES. [2024-06-14 13:17:30,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32639 conditions, 5142 events. 3240/5142 cut-off events. For 315229/315229 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30424 event pairs, 772 based on Foata normal form. 12/5141 useless extension candidates. Maximal degree in co-relation 32538. Up to 4497 conditions per place. [2024-06-14 13:17:30,124 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 212 selfloop transitions, 91 changer transitions 0/308 dead transitions. [2024-06-14 13:17:30,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 308 transitions, 4110 flow [2024-06-14 13:17:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:17:30,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-14 13:17:30,125 INFO L175 Difference]: Start difference. First operand has 210 places, 276 transitions, 3102 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:17:30,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 308 transitions, 4110 flow [2024-06-14 13:17:30,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 308 transitions, 3916 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:30,626 INFO L231 Difference]: Finished difference. Result has 212 places, 283 transitions, 3205 flow [2024-06-14 13:17:30,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3205, PETRI_PLACES=212, PETRI_TRANSITIONS=283} [2024-06-14 13:17:30,627 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-14 13:17:30,627 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 283 transitions, 3205 flow [2024-06-14 13:17:30,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:30,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:30,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:30,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:17:30,628 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:30,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1470240400, now seen corresponding path program 5 times [2024-06-14 13:17:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:30,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182615543] [2024-06-14 13:17:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:33,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:33,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182615543] [2024-06-14 13:17:33,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182615543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:33,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:33,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:33,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462350832] [2024-06-14 13:17:33,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:33,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:33,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:33,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:33,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:33,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 283 transitions, 3205 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:33,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:33,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:33,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:35,058 INFO L124 PetriNetUnfolderBase]: 3220/5118 cut-off events. [2024-06-14 13:17:35,059 INFO L125 PetriNetUnfolderBase]: For 303503/303503 co-relation queries the response was YES. [2024-06-14 13:17:35,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31877 conditions, 5118 events. 3220/5118 cut-off events. For 303503/303503 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30297 event pairs, 776 based on Foata normal form. 12/5117 useless extension candidates. Maximal degree in co-relation 31775. Up to 4493 conditions per place. [2024-06-14 13:17:35,092 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 217 selfloop transitions, 82 changer transitions 0/304 dead transitions. [2024-06-14 13:17:35,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 304 transitions, 3981 flow [2024-06-14 13:17:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:17:35,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-14 13:17:35,094 INFO L175 Difference]: Start difference. First operand has 212 places, 283 transitions, 3205 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:17:35,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 304 transitions, 3981 flow [2024-06-14 13:17:35,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 304 transitions, 3806 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:35,392 INFO L231 Difference]: Finished difference. Result has 214 places, 283 transitions, 3208 flow [2024-06-14 13:17:35,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3208, PETRI_PLACES=214, PETRI_TRANSITIONS=283} [2024-06-14 13:17:35,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-14 13:17:35,393 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 283 transitions, 3208 flow [2024-06-14 13:17:35,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:35,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:35,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:35,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:17:35,393 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:35,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1746718673, now seen corresponding path program 1 times [2024-06-14 13:17:35,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:35,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295431649] [2024-06-14 13:17:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:35,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:37,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:37,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295431649] [2024-06-14 13:17:37,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295431649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:37,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:37,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:37,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109286010] [2024-06-14 13:17:37,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:37,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:37,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:37,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:37,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:37,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 283 transitions, 3208 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:37,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:37,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:37,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:39,878 INFO L124 PetriNetUnfolderBase]: 3326/5317 cut-off events. [2024-06-14 13:17:39,879 INFO L125 PetriNetUnfolderBase]: For 318311/318315 co-relation queries the response was YES. [2024-06-14 13:17:39,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33707 conditions, 5317 events. 3326/5317 cut-off events. For 318311/318315 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31972 event pairs, 887 based on Foata normal form. 6/5318 useless extension candidates. Maximal degree in co-relation 33604. Up to 4300 conditions per place. [2024-06-14 13:17:39,924 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 201 selfloop transitions, 121 changer transitions 0/327 dead transitions. [2024-06-14 13:17:39,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 327 transitions, 4347 flow [2024-06-14 13:17:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:17:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:17:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 13:17:39,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 13:17:39,926 INFO L175 Difference]: Start difference. First operand has 214 places, 283 transitions, 3208 flow. Second operand 7 states and 141 transitions. [2024-06-14 13:17:39,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 327 transitions, 4347 flow [2024-06-14 13:17:40,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 327 transitions, 4113 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:40,278 INFO L231 Difference]: Finished difference. Result has 213 places, 294 transitions, 3377 flow [2024-06-14 13:17:40,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3377, PETRI_PLACES=213, PETRI_TRANSITIONS=294} [2024-06-14 13:17:40,278 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-14 13:17:40,279 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 294 transitions, 3377 flow [2024-06-14 13:17:40,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:40,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:40,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:40,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:17:40,279 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:40,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1159792729, now seen corresponding path program 2 times [2024-06-14 13:17:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:40,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504814289] [2024-06-14 13:17:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:43,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:43,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504814289] [2024-06-14 13:17:43,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504814289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:43,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:43,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:43,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408633218] [2024-06-14 13:17:43,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:43,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:43,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:43,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:43,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:43,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 294 transitions, 3377 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:43,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:43,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:43,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:45,317 INFO L124 PetriNetUnfolderBase]: 3336/5330 cut-off events. [2024-06-14 13:17:45,317 INFO L125 PetriNetUnfolderBase]: For 328905/328905 co-relation queries the response was YES. [2024-06-14 13:17:45,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34139 conditions, 5330 events. 3336/5330 cut-off events. For 328905/328905 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32053 event pairs, 892 based on Foata normal form. 2/5327 useless extension candidates. Maximal degree in co-relation 34035. Up to 4306 conditions per place. [2024-06-14 13:17:45,365 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 203 selfloop transitions, 121 changer transitions 0/329 dead transitions. [2024-06-14 13:17:45,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 329 transitions, 4288 flow [2024-06-14 13:17:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:17:45,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:17:45,367 INFO L175 Difference]: Start difference. First operand has 213 places, 294 transitions, 3377 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:17:45,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 329 transitions, 4288 flow [2024-06-14 13:17:45,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 329 transitions, 4140 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:17:45,737 INFO L231 Difference]: Finished difference. Result has 218 places, 297 transitions, 3518 flow [2024-06-14 13:17:45,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3518, PETRI_PLACES=218, PETRI_TRANSITIONS=297} [2024-06-14 13:17:45,737 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-14 13:17:45,738 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 297 transitions, 3518 flow [2024-06-14 13:17:45,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:45,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:45,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:45,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:17:45,738 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:45,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:45,739 INFO L85 PathProgramCache]: Analyzing trace with hash 268548437, now seen corresponding path program 3 times [2024-06-14 13:17:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:45,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378521716] [2024-06-14 13:17:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:45,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:48,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:48,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378521716] [2024-06-14 13:17:48,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378521716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:48,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:48,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:48,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620537342] [2024-06-14 13:17:48,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:48,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:48,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:48,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:48,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 297 transitions, 3518 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:48,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:48,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:48,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:50,351 INFO L124 PetriNetUnfolderBase]: 3324/5295 cut-off events. [2024-06-14 13:17:50,351 INFO L125 PetriNetUnfolderBase]: For 336442/336442 co-relation queries the response was YES. [2024-06-14 13:17:50,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34076 conditions, 5295 events. 3324/5295 cut-off events. For 336442/336442 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31606 event pairs, 837 based on Foata normal form. 4/5297 useless extension candidates. Maximal degree in co-relation 33971. Up to 4961 conditions per place. [2024-06-14 13:17:50,401 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 272 selfloop transitions, 45 changer transitions 0/322 dead transitions. [2024-06-14 13:17:50,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 322 transitions, 4242 flow [2024-06-14 13:17:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:17:50,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-14 13:17:50,403 INFO L175 Difference]: Start difference. First operand has 218 places, 297 transitions, 3518 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:17:50,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 322 transitions, 4242 flow [2024-06-14 13:17:50,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 322 transitions, 3978 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:50,856 INFO L231 Difference]: Finished difference. Result has 220 places, 297 transitions, 3356 flow [2024-06-14 13:17:50,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3356, PETRI_PLACES=220, PETRI_TRANSITIONS=297} [2024-06-14 13:17:50,856 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-14 13:17:50,856 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 297 transitions, 3356 flow [2024-06-14 13:17:50,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:50,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:50,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:50,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:17:50,857 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:50,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1116877141, now seen corresponding path program 4 times [2024-06-14 13:17:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:50,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879086395] [2024-06-14 13:17:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:53,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:53,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879086395] [2024-06-14 13:17:53,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879086395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:53,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:53,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:53,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805608466] [2024-06-14 13:17:53,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:53,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:53,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:53,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:53,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:53,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 297 transitions, 3356 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:53,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:53,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:53,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:55,881 INFO L124 PetriNetUnfolderBase]: 3334/5321 cut-off events. [2024-06-14 13:17:55,881 INFO L125 PetriNetUnfolderBase]: For 340588/340588 co-relation queries the response was YES. [2024-06-14 13:17:55,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33735 conditions, 5321 events. 3334/5321 cut-off events. For 340588/340588 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31899 event pairs, 1005 based on Foata normal form. 2/5306 useless extension candidates. Maximal degree in co-relation 33629. Up to 4301 conditions per place. [2024-06-14 13:17:55,931 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 210 selfloop transitions, 113 changer transitions 0/328 dead transitions. [2024-06-14 13:17:55,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 328 transitions, 4254 flow [2024-06-14 13:17:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:17:55,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:17:55,933 INFO L175 Difference]: Start difference. First operand has 220 places, 297 transitions, 3356 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:17:55,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 328 transitions, 4254 flow [2024-06-14 13:17:56,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 328 transitions, 4164 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:56,363 INFO L231 Difference]: Finished difference. Result has 221 places, 300 transitions, 3538 flow [2024-06-14 13:17:56,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3538, PETRI_PLACES=221, PETRI_TRANSITIONS=300} [2024-06-14 13:17:56,363 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-14 13:17:56,364 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 300 transitions, 3538 flow [2024-06-14 13:17:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:56,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:56,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:56,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:17:56,364 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:56,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -750818553, now seen corresponding path program 5 times [2024-06-14 13:17:56,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:56,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512242853] [2024-06-14 13:17:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:56,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:59,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512242853] [2024-06-14 13:17:59,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512242853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:59,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:59,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:59,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764451803] [2024-06-14 13:17:59,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:59,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:59,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:59,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:59,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:59,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:59,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 300 transitions, 3538 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:59,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:59,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:59,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:01,090 INFO L124 PetriNetUnfolderBase]: 3344/5341 cut-off events. [2024-06-14 13:18:01,090 INFO L125 PetriNetUnfolderBase]: For 353899/353911 co-relation queries the response was YES. [2024-06-14 13:18:01,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34524 conditions, 5341 events. 3344/5341 cut-off events. For 353899/353911 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32098 event pairs, 870 based on Foata normal form. 10/5339 useless extension candidates. Maximal degree in co-relation 34417. Up to 4307 conditions per place. [2024-06-14 13:18:01,137 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 215 selfloop transitions, 112 changer transitions 0/332 dead transitions. [2024-06-14 13:18:01,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 332 transitions, 4580 flow [2024-06-14 13:18:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 13:18:01,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 13:18:01,138 INFO L175 Difference]: Start difference. First operand has 221 places, 300 transitions, 3538 flow. Second operand 7 states and 134 transitions. [2024-06-14 13:18:01,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 332 transitions, 4580 flow [2024-06-14 13:18:01,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 332 transitions, 4427 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:01,597 INFO L231 Difference]: Finished difference. Result has 223 places, 303 transitions, 3658 flow [2024-06-14 13:18:01,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3387, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3658, PETRI_PLACES=223, PETRI_TRANSITIONS=303} [2024-06-14 13:18:01,598 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-14 13:18:01,598 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 303 transitions, 3658 flow [2024-06-14 13:18:01,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:01,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:01,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:01,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:18:01,599 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1124936785, now seen corresponding path program 6 times [2024-06-14 13:18:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:01,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055853165] [2024-06-14 13:18:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:01,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:04,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:04,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055853165] [2024-06-14 13:18:04,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055853165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:04,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:04,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:04,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568458071] [2024-06-14 13:18:04,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:04,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:04,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:04,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:04,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:04,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 303 transitions, 3658 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:04,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:04,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:04,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:06,286 INFO L124 PetriNetUnfolderBase]: 3318/5299 cut-off events. [2024-06-14 13:18:06,286 INFO L125 PetriNetUnfolderBase]: For 362611/362623 co-relation queries the response was YES. [2024-06-14 13:18:06,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34184 conditions, 5299 events. 3318/5299 cut-off events. For 362611/362623 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31799 event pairs, 884 based on Foata normal form. 14/5301 useless extension candidates. Maximal degree in co-relation 34075. Up to 4288 conditions per place. [2024-06-14 13:18:06,335 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 217 selfloop transitions, 106 changer transitions 0/328 dead transitions. [2024-06-14 13:18:06,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 328 transitions, 4510 flow [2024-06-14 13:18:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:18:06,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 13:18:06,336 INFO L175 Difference]: Start difference. First operand has 223 places, 303 transitions, 3658 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:18:06,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 328 transitions, 4510 flow [2024-06-14 13:18:06,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 328 transitions, 4370 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:06,786 INFO L231 Difference]: Finished difference. Result has 227 places, 303 transitions, 3738 flow [2024-06-14 13:18:06,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3738, PETRI_PLACES=227, PETRI_TRANSITIONS=303} [2024-06-14 13:18:06,787 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 13:18:06,787 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 303 transitions, 3738 flow [2024-06-14 13:18:06,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:06,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:06,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:06,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:18:06,788 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:06,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:06,788 INFO L85 PathProgramCache]: Analyzing trace with hash -599679889, now seen corresponding path program 7 times [2024-06-14 13:18:06,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:06,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834290189] [2024-06-14 13:18:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:06,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:09,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:09,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834290189] [2024-06-14 13:18:09,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834290189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:09,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:09,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:09,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659593814] [2024-06-14 13:18:09,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:09,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:09,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:09,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:09,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:09,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:09,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 303 transitions, 3738 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:09,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:09,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:09,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:12,497 INFO L124 PetriNetUnfolderBase]: 3300/5273 cut-off events. [2024-06-14 13:18:12,497 INFO L125 PetriNetUnfolderBase]: For 361847/361847 co-relation queries the response was YES. [2024-06-14 13:18:12,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33897 conditions, 5273 events. 3300/5273 cut-off events. For 361847/361847 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31606 event pairs, 946 based on Foata normal form. 6/5262 useless extension candidates. Maximal degree in co-relation 33787. Up to 4277 conditions per place. [2024-06-14 13:18:12,548 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 215 selfloop transitions, 116 changer transitions 0/336 dead transitions. [2024-06-14 13:18:12,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 336 transitions, 4756 flow [2024-06-14 13:18:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:18:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:18:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:18:12,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:18:12,551 INFO L175 Difference]: Start difference. First operand has 227 places, 303 transitions, 3738 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:18:12,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 336 transitions, 4756 flow [2024-06-14 13:18:13,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 336 transitions, 4596 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:13,053 INFO L231 Difference]: Finished difference. Result has 232 places, 303 transitions, 3817 flow [2024-06-14 13:18:13,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3817, PETRI_PLACES=232, PETRI_TRANSITIONS=303} [2024-06-14 13:18:13,054 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-14 13:18:13,054 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 303 transitions, 3817 flow [2024-06-14 13:18:13,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:13,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:13,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:13,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:18:13,054 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:13,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:13,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1500929011, now seen corresponding path program 8 times [2024-06-14 13:18:13,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:13,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885279958] [2024-06-14 13:18:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:13,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:16,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:16,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885279958] [2024-06-14 13:18:16,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885279958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:16,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:16,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615490659] [2024-06-14 13:18:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:16,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:16,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 303 transitions, 3817 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:16,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:16,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:16,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:18,211 INFO L124 PetriNetUnfolderBase]: 3274/5237 cut-off events. [2024-06-14 13:18:18,211 INFO L125 PetriNetUnfolderBase]: For 359986/359986 co-relation queries the response was YES. [2024-06-14 13:18:18,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33566 conditions, 5237 events. 3274/5237 cut-off events. For 359986/359986 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31401 event pairs, 948 based on Foata normal form. 6/5226 useless extension candidates. Maximal degree in co-relation 33455. Up to 4258 conditions per place. [2024-06-14 13:18:18,259 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 213 selfloop transitions, 112 changer transitions 0/330 dead transitions. [2024-06-14 13:18:18,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 330 transitions, 4681 flow [2024-06-14 13:18:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:18:18,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:18:18,261 INFO L175 Difference]: Start difference. First operand has 232 places, 303 transitions, 3817 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:18:18,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 330 transitions, 4681 flow [2024-06-14 13:18:18,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 330 transitions, 4401 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:18:18,783 INFO L231 Difference]: Finished difference. Result has 232 places, 303 transitions, 3770 flow [2024-06-14 13:18:18,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=232, PETRI_TRANSITIONS=303} [2024-06-14 13:18:18,784 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-14 13:18:18,784 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 303 transitions, 3770 flow [2024-06-14 13:18:18,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:18,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:18,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:18,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:18:18,784 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:18,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:18,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1833106799, now seen corresponding path program 9 times [2024-06-14 13:18:18,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:18,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730931618] [2024-06-14 13:18:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:18,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:21,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:21,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730931618] [2024-06-14 13:18:21,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730931618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:21,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:21,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:21,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999639242] [2024-06-14 13:18:21,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:21,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:21,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:21,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:21,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 303 transitions, 3770 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:21,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:21,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:21,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:23,107 INFO L124 PetriNetUnfolderBase]: 3256/5192 cut-off events. [2024-06-14 13:18:23,107 INFO L125 PetriNetUnfolderBase]: For 353454/353454 co-relation queries the response was YES. [2024-06-14 13:18:23,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33006 conditions, 5192 events. 3256/5192 cut-off events. For 353454/353454 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30980 event pairs, 784 based on Foata normal form. 6/5185 useless extension candidates. Maximal degree in co-relation 32894. Up to 4535 conditions per place. [2024-06-14 13:18:23,157 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 236 selfloop transitions, 83 changer transitions 0/324 dead transitions. [2024-06-14 13:18:23,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 324 transitions, 4604 flow [2024-06-14 13:18:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:18:23,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-14 13:18:23,159 INFO L175 Difference]: Start difference. First operand has 232 places, 303 transitions, 3770 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:18:23,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 324 transitions, 4604 flow [2024-06-14 13:18:23,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 324 transitions, 4372 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:23,703 INFO L231 Difference]: Finished difference. Result has 233 places, 303 transitions, 3713 flow [2024-06-14 13:18:23,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3713, PETRI_PLACES=233, PETRI_TRANSITIONS=303} [2024-06-14 13:18:23,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-14 13:18:23,703 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 303 transitions, 3713 flow [2024-06-14 13:18:23,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:23,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:23,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:23,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:18:23,704 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:23,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1837619045, now seen corresponding path program 10 times [2024-06-14 13:18:23,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:23,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273288930] [2024-06-14 13:18:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:23,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:26,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:26,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273288930] [2024-06-14 13:18:26,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273288930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:26,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:26,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:26,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781418200] [2024-06-14 13:18:26,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:26,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:26,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:26,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:26,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:26,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 303 transitions, 3713 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:26,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:26,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:26,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:28,268 INFO L124 PetriNetUnfolderBase]: 3204/5120 cut-off events. [2024-06-14 13:18:28,268 INFO L125 PetriNetUnfolderBase]: For 345887/345887 co-relation queries the response was YES. [2024-06-14 13:18:28,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31642 conditions, 5120 events. 3204/5120 cut-off events. For 345887/345887 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30606 event pairs, 768 based on Foata normal form. 12/5119 useless extension candidates. Maximal degree in co-relation 31529. Up to 4497 conditions per place. [2024-06-14 13:18:28,316 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 234 selfloop transitions, 88 changer transitions 0/327 dead transitions. [2024-06-14 13:18:28,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 327 transitions, 4434 flow [2024-06-14 13:18:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:18:28,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-14 13:18:28,317 INFO L175 Difference]: Start difference. First operand has 233 places, 303 transitions, 3713 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:18:28,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 327 transitions, 4434 flow [2024-06-14 13:18:28,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 327 transitions, 4208 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:28,780 INFO L231 Difference]: Finished difference. Result has 235 places, 303 transitions, 3676 flow [2024-06-14 13:18:28,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3676, PETRI_PLACES=235, PETRI_TRANSITIONS=303} [2024-06-14 13:18:28,780 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-14 13:18:28,781 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 303 transitions, 3676 flow [2024-06-14 13:18:28,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:28,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:28,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:28,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:18:28,781 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:28,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1445345531, now seen corresponding path program 1 times [2024-06-14 13:18:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:28,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315955379] [2024-06-14 13:18:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:28,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:32,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:32,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315955379] [2024-06-14 13:18:32,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315955379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:32,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:32,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089732997] [2024-06-14 13:18:32,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:32,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:32,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:32,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:32,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:32,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 303 transitions, 3676 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:32,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:32,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:32,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:34,301 INFO L124 PetriNetUnfolderBase]: 3256/5204 cut-off events. [2024-06-14 13:18:34,301 INFO L125 PetriNetUnfolderBase]: For 358973/358973 co-relation queries the response was YES. [2024-06-14 13:18:34,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32096 conditions, 5204 events. 3256/5204 cut-off events. For 358973/358973 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31245 event pairs, 784 based on Foata normal form. 14/5205 useless extension candidates. Maximal degree in co-relation 31982. Up to 4837 conditions per place. [2024-06-14 13:18:34,350 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 289 selfloop transitions, 33 changer transitions 0/327 dead transitions. [2024-06-14 13:18:34,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 327 transitions, 4445 flow [2024-06-14 13:18:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:18:34,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 13:18:34,351 INFO L175 Difference]: Start difference. First operand has 235 places, 303 transitions, 3676 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:18:34,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 327 transitions, 4445 flow [2024-06-14 13:18:34,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 4121 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:18:34,800 INFO L231 Difference]: Finished difference. Result has 231 places, 305 transitions, 3460 flow [2024-06-14 13:18:34,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3353, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3460, PETRI_PLACES=231, PETRI_TRANSITIONS=305} [2024-06-14 13:18:34,801 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-14 13:18:34,801 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 305 transitions, 3460 flow [2024-06-14 13:18:34,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:34,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:34,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:34,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:18:34,802 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:34,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:34,802 INFO L85 PathProgramCache]: Analyzing trace with hash 162287595, now seen corresponding path program 2 times [2024-06-14 13:18:34,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:34,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830992816] [2024-06-14 13:18:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:34,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:38,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:38,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830992816] [2024-06-14 13:18:38,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830992816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:38,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:38,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:38,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718042931] [2024-06-14 13:18:38,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:38,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:38,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:38,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 305 transitions, 3460 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:38,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:38,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:38,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:39,764 INFO L124 PetriNetUnfolderBase]: 3317/5303 cut-off events. [2024-06-14 13:18:39,764 INFO L125 PetriNetUnfolderBase]: For 364174/364174 co-relation queries the response was YES. [2024-06-14 13:18:39,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32820 conditions, 5303 events. 3317/5303 cut-off events. For 364174/364174 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 31868 event pairs, 815 based on Foata normal form. 8/5298 useless extension candidates. Maximal degree in co-relation 32706. Up to 4777 conditions per place. [2024-06-14 13:18:39,811 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 296 selfloop transitions, 32 changer transitions 0/333 dead transitions. [2024-06-14 13:18:39,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 333 transitions, 4414 flow [2024-06-14 13:18:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:18:39,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-14 13:18:39,813 INFO L175 Difference]: Start difference. First operand has 231 places, 305 transitions, 3460 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:18:39,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 333 transitions, 4414 flow [2024-06-14 13:18:40,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 333 transitions, 4331 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:40,315 INFO L231 Difference]: Finished difference. Result has 233 places, 307 transitions, 3479 flow [2024-06-14 13:18:40,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3377, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3479, PETRI_PLACES=233, PETRI_TRANSITIONS=307} [2024-06-14 13:18:40,315 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-14 13:18:40,315 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 307 transitions, 3479 flow [2024-06-14 13:18:40,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:40,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:40,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:40,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:18:40,316 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:40,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1382790801, now seen corresponding path program 1 times [2024-06-14 13:18:40,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:40,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753580937] [2024-06-14 13:18:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:40,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:43,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753580937] [2024-06-14 13:18:43,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753580937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:43,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:43,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:43,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267291671] [2024-06-14 13:18:43,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:43,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:43,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:43,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:43,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:43,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 307 transitions, 3479 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:43,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:43,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:43,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:45,541 INFO L124 PetriNetUnfolderBase]: 3325/5336 cut-off events. [2024-06-14 13:18:45,542 INFO L125 PetriNetUnfolderBase]: For 359616/359619 co-relation queries the response was YES. [2024-06-14 13:18:45,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33045 conditions, 5336 events. 3325/5336 cut-off events. For 359616/359619 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32268 event pairs, 865 based on Foata normal form. 4/5337 useless extension candidates. Maximal degree in co-relation 32930. Up to 5020 conditions per place. [2024-06-14 13:18:45,582 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 300 selfloop transitions, 30 changer transitions 0/335 dead transitions. [2024-06-14 13:18:45,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 335 transitions, 4441 flow [2024-06-14 13:18:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:45,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:18:45,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 13:18:45,585 INFO L175 Difference]: Start difference. First operand has 233 places, 307 transitions, 3479 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:18:45,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 335 transitions, 4441 flow [2024-06-14 13:18:46,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 335 transitions, 4398 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:46,102 INFO L231 Difference]: Finished difference. Result has 237 places, 311 transitions, 3585 flow [2024-06-14 13:18:46,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3585, PETRI_PLACES=237, PETRI_TRANSITIONS=311} [2024-06-14 13:18:46,102 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-14 13:18:46,102 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 311 transitions, 3585 flow [2024-06-14 13:18:46,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:46,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:46,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:46,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:18:46,103 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:46,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1127723375, now seen corresponding path program 2 times [2024-06-14 13:18:46,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:46,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834780190] [2024-06-14 13:18:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:46,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:49,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:49,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834780190] [2024-06-14 13:18:49,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834780190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:49,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:49,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246175167] [2024-06-14 13:18:49,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:49,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:49,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:49,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:49,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:49,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 311 transitions, 3585 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:49,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:49,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:49,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:51,407 INFO L124 PetriNetUnfolderBase]: 3333/5348 cut-off events. [2024-06-14 13:18:51,408 INFO L125 PetriNetUnfolderBase]: For 369688/369691 co-relation queries the response was YES. [2024-06-14 13:18:51,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33423 conditions, 5348 events. 3333/5348 cut-off events. For 369688/369691 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32372 event pairs, 901 based on Foata normal form. 4/5349 useless extension candidates. Maximal degree in co-relation 33306. Up to 5069 conditions per place. [2024-06-14 13:18:51,451 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 300 selfloop transitions, 27 changer transitions 0/332 dead transitions. [2024-06-14 13:18:51,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 332 transitions, 4343 flow [2024-06-14 13:18:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:18:51,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-14 13:18:51,452 INFO L175 Difference]: Start difference. First operand has 237 places, 311 transitions, 3585 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:18:51,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 332 transitions, 4343 flow [2024-06-14 13:18:52,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 332 transitions, 4243 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:52,098 INFO L231 Difference]: Finished difference. Result has 241 places, 313 transitions, 3592 flow [2024-06-14 13:18:52,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3592, PETRI_PLACES=241, PETRI_TRANSITIONS=313} [2024-06-14 13:18:52,098 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-14 13:18:52,098 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 313 transitions, 3592 flow [2024-06-14 13:18:52,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:52,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:52,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:52,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:18:52,099 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:52,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:52,099 INFO L85 PathProgramCache]: Analyzing trace with hash -627108689, now seen corresponding path program 3 times [2024-06-14 13:18:52,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:52,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608059886] [2024-06-14 13:18:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:52,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:55,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:55,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608059886] [2024-06-14 13:18:55,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608059886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:55,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:55,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:55,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810478688] [2024-06-14 13:18:55,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:55,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:55,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:55,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:55,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:55,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 313 transitions, 3592 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:55,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:55,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:55,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:58,047 INFO L124 PetriNetUnfolderBase]: 3341/5358 cut-off events. [2024-06-14 13:18:58,047 INFO L125 PetriNetUnfolderBase]: For 379010/379010 co-relation queries the response was YES. [2024-06-14 13:18:58,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33572 conditions, 5358 events. 3341/5358 cut-off events. For 379010/379010 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32431 event pairs, 916 based on Foata normal form. 2/5356 useless extension candidates. Maximal degree in co-relation 33453. Up to 5081 conditions per place. [2024-06-14 13:18:58,101 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 301 selfloop transitions, 29 changer transitions 0/335 dead transitions. [2024-06-14 13:18:58,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 335 transitions, 4344 flow [2024-06-14 13:18:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:18:58,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-14 13:18:58,103 INFO L175 Difference]: Start difference. First operand has 241 places, 313 transitions, 3592 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:18:58,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 335 transitions, 4344 flow [2024-06-14 13:18:58,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 335 transitions, 4275 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:58,760 INFO L231 Difference]: Finished difference. Result has 244 places, 315 transitions, 3620 flow [2024-06-14 13:18:58,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3620, PETRI_PLACES=244, PETRI_TRANSITIONS=315} [2024-06-14 13:18:58,761 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-14 13:18:58,761 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 315 transitions, 3620 flow [2024-06-14 13:18:58,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:58,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:58,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:58,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:18:58,761 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:58,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:58,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1501123629, now seen corresponding path program 1 times [2024-06-14 13:18:58,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:58,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138601203] [2024-06-14 13:18:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:58,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:02,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:02,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138601203] [2024-06-14 13:19:02,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138601203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:02,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:02,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:02,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3082365] [2024-06-14 13:19:02,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:02,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:02,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:02,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 315 transitions, 3620 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:02,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:02,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:02,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:04,908 INFO L124 PetriNetUnfolderBase]: 3357/5386 cut-off events. [2024-06-14 13:19:04,908 INFO L125 PetriNetUnfolderBase]: For 395245/395245 co-relation queries the response was YES. [2024-06-14 13:19:04,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33908 conditions, 5386 events. 3357/5386 cut-off events. For 395245/395245 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32680 event pairs, 1006 based on Foata normal form. 4/5373 useless extension candidates. Maximal degree in co-relation 33788. Up to 4415 conditions per place. [2024-06-14 13:19:04,952 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 221 selfloop transitions, 116 changer transitions 0/342 dead transitions. [2024-06-14 13:19:04,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 342 transitions, 4430 flow [2024-06-14 13:19:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:19:04,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-14 13:19:04,953 INFO L175 Difference]: Start difference. First operand has 244 places, 315 transitions, 3620 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:19:04,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 342 transitions, 4430 flow [2024-06-14 13:19:05,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 342 transitions, 4353 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:05,446 INFO L231 Difference]: Finished difference. Result has 246 places, 318 transitions, 3849 flow [2024-06-14 13:19:05,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3849, PETRI_PLACES=246, PETRI_TRANSITIONS=318} [2024-06-14 13:19:05,447 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-14 13:19:05,447 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 318 transitions, 3849 flow [2024-06-14 13:19:05,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:05,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:05,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:05,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:19:05,448 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:05,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:05,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1833096879, now seen corresponding path program 4 times [2024-06-14 13:19:05,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:05,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721745710] [2024-06-14 13:19:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:05,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:09,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721745710] [2024-06-14 13:19:09,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721745710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:09,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:09,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:09,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674304011] [2024-06-14 13:19:09,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:09,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:09,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:09,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:09,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:09,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 318 transitions, 3849 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:09,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:09,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:09,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:10,682 INFO L124 PetriNetUnfolderBase]: 3352/5370 cut-off events. [2024-06-14 13:19:10,682 INFO L125 PetriNetUnfolderBase]: For 396710/396710 co-relation queries the response was YES. [2024-06-14 13:19:10,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34476 conditions, 5370 events. 3352/5370 cut-off events. For 396710/396710 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32454 event pairs, 956 based on Foata normal form. 2/5370 useless extension candidates. Maximal degree in co-relation 34355. Up to 5148 conditions per place. [2024-06-14 13:19:10,736 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 312 selfloop transitions, 16 changer transitions 0/333 dead transitions. [2024-06-14 13:19:10,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 333 transitions, 4549 flow [2024-06-14 13:19:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 13:19:10,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2024-06-14 13:19:10,738 INFO L175 Difference]: Start difference. First operand has 246 places, 318 transitions, 3849 flow. Second operand 8 states and 122 transitions. [2024-06-14 13:19:10,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 333 transitions, 4549 flow [2024-06-14 13:19:11,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 333 transitions, 4249 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:11,568 INFO L231 Difference]: Finished difference. Result has 248 places, 318 transitions, 3586 flow [2024-06-14 13:19:11,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3549, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3586, PETRI_PLACES=248, PETRI_TRANSITIONS=318} [2024-06-14 13:19:11,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-14 13:19:11,568 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 318 transitions, 3586 flow [2024-06-14 13:19:11,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:11,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:11,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:11,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:19:11,569 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:11,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:11,569 INFO L85 PathProgramCache]: Analyzing trace with hash 161997869, now seen corresponding path program 2 times [2024-06-14 13:19:11,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:11,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678651265] [2024-06-14 13:19:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:15,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678651265] [2024-06-14 13:19:15,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678651265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:15,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:15,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:15,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425392611] [2024-06-14 13:19:15,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:15,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:15,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:15,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:15,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:15,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 318 transitions, 3586 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:15,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:15,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:15,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:17,651 INFO L124 PetriNetUnfolderBase]: 3404/5430 cut-off events. [2024-06-14 13:19:17,651 INFO L125 PetriNetUnfolderBase]: For 440427/440427 co-relation queries the response was YES. [2024-06-14 13:19:17,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34478 conditions, 5430 events. 3404/5430 cut-off events. For 440427/440427 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32702 event pairs, 794 based on Foata normal form. 14/5431 useless extension candidates. Maximal degree in co-relation 34356. Up to 4751 conditions per place. [2024-06-14 13:19:17,704 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 248 selfloop transitions, 96 changer transitions 0/349 dead transitions. [2024-06-14 13:19:17,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 349 transitions, 4430 flow [2024-06-14 13:19:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:19:17,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931818181818182 [2024-06-14 13:19:17,706 INFO L175 Difference]: Start difference. First operand has 248 places, 318 transitions, 3586 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:19:17,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 349 transitions, 4430 flow [2024-06-14 13:19:18,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 349 transitions, 4379 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:19:18,578 INFO L231 Difference]: Finished difference. Result has 251 places, 321 transitions, 3809 flow [2024-06-14 13:19:18,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3809, PETRI_PLACES=251, PETRI_TRANSITIONS=321} [2024-06-14 13:19:18,579 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 206 predicate places. [2024-06-14 13:19:18,579 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 321 transitions, 3809 flow [2024-06-14 13:19:18,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:18,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:18,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:18,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:19:18,580 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:18,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash 162294539, now seen corresponding path program 3 times [2024-06-14 13:19:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796350440] [2024-06-14 13:19:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:22,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:22,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796350440] [2024-06-14 13:19:22,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796350440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:22,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:22,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:22,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47997994] [2024-06-14 13:19:22,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:22,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:22,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:22,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:22,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:22,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:22,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 321 transitions, 3809 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:22,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:22,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:22,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:24,915 INFO L124 PetriNetUnfolderBase]: 3924/6236 cut-off events. [2024-06-14 13:19:24,915 INFO L125 PetriNetUnfolderBase]: For 704961/704961 co-relation queries the response was YES. [2024-06-14 13:19:24,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45301 conditions, 6236 events. 3924/6236 cut-off events. For 704961/704961 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37771 event pairs, 964 based on Foata normal form. 14/6237 useless extension candidates. Maximal degree in co-relation 45178. Up to 4672 conditions per place. [2024-06-14 13:19:24,975 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 259 selfloop transitions, 100 changer transitions 0/364 dead transitions. [2024-06-14 13:19:24,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 364 transitions, 4965 flow [2024-06-14 13:19:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:19:24,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:19:24,976 INFO L175 Difference]: Start difference. First operand has 251 places, 321 transitions, 3809 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:19:24,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 364 transitions, 4965 flow [2024-06-14 13:19:25,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 364 transitions, 4723 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 13:19:25,770 INFO L231 Difference]: Finished difference. Result has 254 places, 327 transitions, 3933 flow [2024-06-14 13:19:25,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3933, PETRI_PLACES=254, PETRI_TRANSITIONS=327} [2024-06-14 13:19:25,770 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-14 13:19:25,770 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 327 transitions, 3933 flow [2024-06-14 13:19:25,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:25,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:25,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:25,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:19:25,771 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:25,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash -74177491, now seen corresponding path program 4 times [2024-06-14 13:19:25,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:25,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394201754] [2024-06-14 13:19:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:25,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394201754] [2024-06-14 13:19:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394201754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:29,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:29,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:29,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001418020] [2024-06-14 13:19:29,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:29,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:29,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:29,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:29,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 327 transitions, 3933 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:29,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:29,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:29,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:31,929 INFO L124 PetriNetUnfolderBase]: 3891/6189 cut-off events. [2024-06-14 13:19:31,929 INFO L125 PetriNetUnfolderBase]: For 672925/672925 co-relation queries the response was YES. [2024-06-14 13:19:31,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44111 conditions, 6189 events. 3891/6189 cut-off events. For 672925/672925 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37526 event pairs, 1017 based on Foata normal form. 14/6190 useless extension candidates. Maximal degree in co-relation 43986. Up to 5504 conditions per place. [2024-06-14 13:19:31,986 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 261 selfloop transitions, 89 changer transitions 0/355 dead transitions. [2024-06-14 13:19:31,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 355 transitions, 4797 flow [2024-06-14 13:19:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:19:31,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-14 13:19:31,987 INFO L175 Difference]: Start difference. First operand has 254 places, 327 transitions, 3933 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:19:31,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 355 transitions, 4797 flow [2024-06-14 13:19:32,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 355 transitions, 4539 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 13:19:32,940 INFO L231 Difference]: Finished difference. Result has 256 places, 330 transitions, 3949 flow [2024-06-14 13:19:32,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3681, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3949, PETRI_PLACES=256, PETRI_TRANSITIONS=330} [2024-06-14 13:19:32,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-14 13:19:32,941 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 330 transitions, 3949 flow [2024-06-14 13:19:32,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:32,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:32,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:32,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:19:32,941 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:32,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1807096944, now seen corresponding path program 1 times [2024-06-14 13:19:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:32,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634377838] [2024-06-14 13:19:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:32,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:37,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634377838] [2024-06-14 13:19:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634377838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:37,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:37,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725377790] [2024-06-14 13:19:37,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:37,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:37,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:37,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:37,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 330 transitions, 3949 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:37,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:37,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:37,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:39,985 INFO L124 PetriNetUnfolderBase]: 3906/6239 cut-off events. [2024-06-14 13:19:39,985 INFO L125 PetriNetUnfolderBase]: For 649425/649425 co-relation queries the response was YES. [2024-06-14 13:19:40,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43845 conditions, 6239 events. 3906/6239 cut-off events. For 649425/649425 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38057 event pairs, 958 based on Foata normal form. 2/6239 useless extension candidates. Maximal degree in co-relation 43719. Up to 5764 conditions per place. [2024-06-14 13:19:40,055 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 42 changer transitions 0/377 dead transitions. [2024-06-14 13:19:40,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 377 transitions, 5083 flow [2024-06-14 13:19:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 13:19:40,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 13:19:40,057 INFO L175 Difference]: Start difference. First operand has 256 places, 330 transitions, 3949 flow. Second operand 8 states and 158 transitions. [2024-06-14 13:19:40,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 377 transitions, 5083 flow [2024-06-14 13:19:41,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 377 transitions, 4853 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 13:19:41,122 INFO L231 Difference]: Finished difference. Result has 258 places, 335 transitions, 3916 flow [2024-06-14 13:19:41,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3719, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3916, PETRI_PLACES=258, PETRI_TRANSITIONS=335} [2024-06-14 13:19:41,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-14 13:19:41,123 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 335 transitions, 3916 flow [2024-06-14 13:19:41,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:41,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:41,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:41,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:19:41,123 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:41,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:41,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1746742708, now seen corresponding path program 2 times [2024-06-14 13:19:41,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:41,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650190014] [2024-06-14 13:19:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:41,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:45,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:45,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650190014] [2024-06-14 13:19:45,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650190014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:45,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:45,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:45,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766068671] [2024-06-14 13:19:45,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:45,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:45,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:45,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 335 transitions, 3916 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:45,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:45,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:45,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:47,344 INFO L124 PetriNetUnfolderBase]: 3919/6260 cut-off events. [2024-06-14 13:19:47,344 INFO L125 PetriNetUnfolderBase]: For 661670/661670 co-relation queries the response was YES. [2024-06-14 13:19:47,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43755 conditions, 6260 events. 3919/6260 cut-off events. For 661670/661670 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38314 event pairs, 1135 based on Foata normal form. 2/6260 useless extension candidates. Maximal degree in co-relation 43627. Up to 5911 conditions per place. [2024-06-14 13:19:47,403 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 39 changer transitions 0/372 dead transitions. [2024-06-14 13:19:47,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 372 transitions, 4834 flow [2024-06-14 13:19:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:19:47,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:19:47,405 INFO L175 Difference]: Start difference. First operand has 258 places, 335 transitions, 3916 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:19:47,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 372 transitions, 4834 flow [2024-06-14 13:19:48,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 372 transitions, 4641 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:48,395 INFO L231 Difference]: Finished difference. Result has 262 places, 340 transitions, 3892 flow [2024-06-14 13:19:48,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3892, PETRI_PLACES=262, PETRI_TRANSITIONS=340} [2024-06-14 13:19:48,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-14 13:19:48,395 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 340 transitions, 3892 flow [2024-06-14 13:19:48,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:48,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:48,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:48,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:19:48,396 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:48,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:48,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1885247014, now seen corresponding path program 1 times [2024-06-14 13:19:48,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:48,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969520940] [2024-06-14 13:19:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:48,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:52,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:52,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969520940] [2024-06-14 13:19:52,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969520940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:52,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:52,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:52,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002721568] [2024-06-14 13:19:52,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:52,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:52,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:52,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:52,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:52,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:52,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 340 transitions, 3892 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:52,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:52,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:52,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:54,996 INFO L124 PetriNetUnfolderBase]: 3940/6294 cut-off events. [2024-06-14 13:19:54,996 INFO L125 PetriNetUnfolderBase]: For 679738/679738 co-relation queries the response was YES. [2024-06-14 13:19:55,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44106 conditions, 6294 events. 3940/6294 cut-off events. For 679738/679738 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38632 event pairs, 1085 based on Foata normal form. 1/6293 useless extension candidates. Maximal degree in co-relation 43977. Up to 5814 conditions per place. [2024-06-14 13:19:55,065 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 322 selfloop transitions, 64 changer transitions 0/391 dead transitions. [2024-06-14 13:19:55,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 391 transitions, 5079 flow [2024-06-14 13:19:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 13:19:55,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:19:55,067 INFO L175 Difference]: Start difference. First operand has 262 places, 340 transitions, 3892 flow. Second operand 9 states and 176 transitions. [2024-06-14 13:19:55,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 391 transitions, 5079 flow [2024-06-14 13:19:56,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 391 transitions, 4990 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:56,058 INFO L231 Difference]: Finished difference. Result has 267 places, 346 transitions, 4068 flow [2024-06-14 13:19:56,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4068, PETRI_PLACES=267, PETRI_TRANSITIONS=346} [2024-06-14 13:19:56,059 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-14 13:19:56,059 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 346 transitions, 4068 flow [2024-06-14 13:19:56,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:56,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:56,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:56,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:19:56,060 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:56,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1701994976, now seen corresponding path program 3 times [2024-06-14 13:19:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:56,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602250183] [2024-06-14 13:19:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:59,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:59,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602250183] [2024-06-14 13:19:59,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602250183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:59,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:59,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:59,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161536662] [2024-06-14 13:19:59,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:59,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:59,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:59,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:59,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:59,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:59,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 346 transitions, 4068 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:59,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:59,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:59,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:02,317 INFO L124 PetriNetUnfolderBase]: 3935/6280 cut-off events. [2024-06-14 13:20:02,317 INFO L125 PetriNetUnfolderBase]: For 694886/694886 co-relation queries the response was YES. [2024-06-14 13:20:02,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44846 conditions, 6280 events. 3935/6280 cut-off events. For 694886/694886 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38381 event pairs, 1060 based on Foata normal form. 2/6280 useless extension candidates. Maximal degree in co-relation 44715. Up to 5933 conditions per place. [2024-06-14 13:20:02,381 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 327 selfloop transitions, 39 changer transitions 0/371 dead transitions. [2024-06-14 13:20:02,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 371 transitions, 4891 flow [2024-06-14 13:20:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:20:02,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-14 13:20:02,383 INFO L175 Difference]: Start difference. First operand has 267 places, 346 transitions, 4068 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:20:02,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 371 transitions, 4891 flow [2024-06-14 13:20:03,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 371 transitions, 4657 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:03,530 INFO L231 Difference]: Finished difference. Result has 271 places, 347 transitions, 3944 flow [2024-06-14 13:20:03,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3944, PETRI_PLACES=271, PETRI_TRANSITIONS=347} [2024-06-14 13:20:03,530 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-14 13:20:03,530 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 347 transitions, 3944 flow [2024-06-14 13:20:03,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:03,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:03,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:03,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:20:03,531 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:03,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1391151552, now seen corresponding path program 2 times [2024-06-14 13:20:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:03,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648091798] [2024-06-14 13:20:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:06,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:06,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648091798] [2024-06-14 13:20:06,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648091798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:06,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:06,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14476427] [2024-06-14 13:20:06,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:06,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:06,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:06,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:06,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:07,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:07,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 347 transitions, 3944 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:07,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:07,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:07,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:09,555 INFO L124 PetriNetUnfolderBase]: 4012/6411 cut-off events. [2024-06-14 13:20:09,555 INFO L125 PetriNetUnfolderBase]: For 741053/741053 co-relation queries the response was YES. [2024-06-14 13:20:09,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46096 conditions, 6411 events. 4012/6411 cut-off events. For 741053/741053 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39454 event pairs, 918 based on Foata normal form. 1/6407 useless extension candidates. Maximal degree in co-relation 45963. Up to 4713 conditions per place. [2024-06-14 13:20:09,614 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 225 selfloop transitions, 172 changer transitions 0/402 dead transitions. [2024-06-14 13:20:09,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 402 transitions, 5677 flow [2024-06-14 13:20:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 13:20:09,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 13:20:09,615 INFO L175 Difference]: Start difference. First operand has 271 places, 347 transitions, 3944 flow. Second operand 8 states and 162 transitions. [2024-06-14 13:20:09,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 402 transitions, 5677 flow [2024-06-14 13:20:10,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 402 transitions, 5588 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:10,552 INFO L231 Difference]: Finished difference. Result has 275 places, 361 transitions, 4463 flow [2024-06-14 13:20:10,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3855, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4463, PETRI_PLACES=275, PETRI_TRANSITIONS=361} [2024-06-14 13:20:10,553 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-14 13:20:10,553 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 361 transitions, 4463 flow [2024-06-14 13:20:10,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:10,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:10,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:10,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:20:10,554 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:10,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:10,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1461047828, now seen corresponding path program 3 times [2024-06-14 13:20:10,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:10,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350813106] [2024-06-14 13:20:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:10,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:14,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:14,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350813106] [2024-06-14 13:20:14,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350813106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:14,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:14,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755967490] [2024-06-14 13:20:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:14,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:14,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:14,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:14,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:14,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:14,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 361 transitions, 4463 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:14,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:14,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:14,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:16,777 INFO L124 PetriNetUnfolderBase]: 4017/6420 cut-off events. [2024-06-14 13:20:16,777 INFO L125 PetriNetUnfolderBase]: For 764703/764703 co-relation queries the response was YES. [2024-06-14 13:20:16,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47852 conditions, 6420 events. 4017/6420 cut-off events. For 764703/764703 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39555 event pairs, 918 based on Foata normal form. 1/6416 useless extension candidates. Maximal degree in co-relation 47717. Up to 4715 conditions per place. [2024-06-14 13:20:17,023 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 220 selfloop transitions, 175 changer transitions 0/400 dead transitions. [2024-06-14 13:20:17,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 400 transitions, 6035 flow [2024-06-14 13:20:17,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:20:17,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 13:20:17,028 INFO L175 Difference]: Start difference. First operand has 275 places, 361 transitions, 4463 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:20:17,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 400 transitions, 6035 flow [2024-06-14 13:20:18,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 400 transitions, 5844 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-06-14 13:20:18,137 INFO L231 Difference]: Finished difference. Result has 281 places, 364 transitions, 4709 flow [2024-06-14 13:20:18,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4709, PETRI_PLACES=281, PETRI_TRANSITIONS=364} [2024-06-14 13:20:18,137 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-14 13:20:18,138 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 364 transitions, 4709 flow [2024-06-14 13:20:18,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:18,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:18,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:18,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:20:18,138 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:18,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:18,138 INFO L85 PathProgramCache]: Analyzing trace with hash -264938004, now seen corresponding path program 4 times [2024-06-14 13:20:18,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:18,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516067170] [2024-06-14 13:20:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:18,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:22,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:22,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516067170] [2024-06-14 13:20:22,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516067170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:22,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:22,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:22,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759149015] [2024-06-14 13:20:22,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:22,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:22,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:22,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:22,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:22,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 364 transitions, 4709 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:22,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:22,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:22,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:24,591 INFO L124 PetriNetUnfolderBase]: 4038/6444 cut-off events. [2024-06-14 13:20:24,591 INFO L125 PetriNetUnfolderBase]: For 786048/786048 co-relation queries the response was YES. [2024-06-14 13:20:24,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47822 conditions, 6444 events. 4038/6444 cut-off events. For 786048/786048 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39645 event pairs, 1072 based on Foata normal form. 1/6443 useless extension candidates. Maximal degree in co-relation 47684. Up to 6045 conditions per place. [2024-06-14 13:20:24,649 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 338 selfloop transitions, 53 changer transitions 0/396 dead transitions. [2024-06-14 13:20:24,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 396 transitions, 5856 flow [2024-06-14 13:20:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:20:24,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39141414141414144 [2024-06-14 13:20:24,651 INFO L175 Difference]: Start difference. First operand has 281 places, 364 transitions, 4709 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:20:24,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 396 transitions, 5856 flow [2024-06-14 13:20:25,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 396 transitions, 5499 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:25,765 INFO L231 Difference]: Finished difference. Result has 286 places, 370 transitions, 4600 flow [2024-06-14 13:20:25,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4361, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4600, PETRI_PLACES=286, PETRI_TRANSITIONS=370} [2024-06-14 13:20:25,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-14 13:20:25,765 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 370 transitions, 4600 flow [2024-06-14 13:20:25,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:25,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:25,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:25,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:20:25,766 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:25,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1900526470, now seen corresponding path program 5 times [2024-06-14 13:20:25,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:25,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637274075] [2024-06-14 13:20:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:25,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637274075] [2024-06-14 13:20:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637274075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:29,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:29,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:29,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352018591] [2024-06-14 13:20:29,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:29,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:29,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:29,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 370 transitions, 4600 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:29,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:29,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:29,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:31,993 INFO L124 PetriNetUnfolderBase]: 4043/6435 cut-off events. [2024-06-14 13:20:31,993 INFO L125 PetriNetUnfolderBase]: For 801821/801821 co-relation queries the response was YES. [2024-06-14 13:20:32,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47499 conditions, 6435 events. 4043/6435 cut-off events. For 801821/801821 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39552 event pairs, 1136 based on Foata normal form. 1/6407 useless extension candidates. Maximal degree in co-relation 47359. Up to 4728 conditions per place. [2024-06-14 13:20:32,056 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 243 selfloop transitions, 167 changer transitions 0/415 dead transitions. [2024-06-14 13:20:32,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 415 transitions, 6295 flow [2024-06-14 13:20:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:20:32,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:20:32,058 INFO L175 Difference]: Start difference. First operand has 286 places, 370 transitions, 4600 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:20:32,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 415 transitions, 6295 flow [2024-06-14 13:20:33,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 415 transitions, 6152 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:33,451 INFO L231 Difference]: Finished difference. Result has 288 places, 380 transitions, 5041 flow [2024-06-14 13:20:33,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5041, PETRI_PLACES=288, PETRI_TRANSITIONS=380} [2024-06-14 13:20:33,452 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-14 13:20:33,452 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 380 transitions, 5041 flow [2024-06-14 13:20:33,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:33,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:33,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:33,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:20:33,452 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:33,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash -968803728, now seen corresponding path program 6 times [2024-06-14 13:20:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:33,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338213214] [2024-06-14 13:20:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:36,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338213214] [2024-06-14 13:20:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338213214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:36,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:36,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799111683] [2024-06-14 13:20:36,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:36,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:36,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:36,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:36,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:36,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 380 transitions, 5041 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:36,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:36,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:36,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:39,471 INFO L124 PetriNetUnfolderBase]: 4048/6448 cut-off events. [2024-06-14 13:20:39,471 INFO L125 PetriNetUnfolderBase]: For 824100/824100 co-relation queries the response was YES. [2024-06-14 13:20:39,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48445 conditions, 6448 events. 4048/6448 cut-off events. For 824100/824100 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39729 event pairs, 1136 based on Foata normal form. 1/6420 useless extension candidates. Maximal degree in co-relation 48304. Up to 4730 conditions per place. [2024-06-14 13:20:39,537 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 241 selfloop transitions, 168 changer transitions 0/414 dead transitions. [2024-06-14 13:20:39,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 414 transitions, 6578 flow [2024-06-14 13:20:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:20:39,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 13:20:39,538 INFO L175 Difference]: Start difference. First operand has 288 places, 380 transitions, 5041 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:20:39,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 414 transitions, 6578 flow [2024-06-14 13:20:41,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 414 transitions, 6350 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:41,081 INFO L231 Difference]: Finished difference. Result has 292 places, 383 transitions, 5243 flow [2024-06-14 13:20:41,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4845, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5243, PETRI_PLACES=292, PETRI_TRANSITIONS=383} [2024-06-14 13:20:41,082 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-14 13:20:41,082 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 383 transitions, 5243 flow [2024-06-14 13:20:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:41,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:41,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:41,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:20:41,083 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:41,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash -724120084, now seen corresponding path program 7 times [2024-06-14 13:20:41,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:41,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598512321] [2024-06-14 13:20:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:41,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:44,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:44,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598512321] [2024-06-14 13:20:44,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598512321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:44,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:44,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:44,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640588539] [2024-06-14 13:20:44,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:44,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:44,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:44,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 383 transitions, 5243 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:44,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:44,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:44,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:47,437 INFO L124 PetriNetUnfolderBase]: 4079/6501 cut-off events. [2024-06-14 13:20:47,437 INFO L125 PetriNetUnfolderBase]: For 860686/860686 co-relation queries the response was YES. [2024-06-14 13:20:47,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49686 conditions, 6501 events. 4079/6501 cut-off events. For 860686/860686 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 40154 event pairs, 1142 based on Foata normal form. 3/6475 useless extension candidates. Maximal degree in co-relation 49544. Up to 4747 conditions per place. [2024-06-14 13:20:47,507 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 241 selfloop transitions, 172 changer transitions 0/418 dead transitions. [2024-06-14 13:20:47,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 418 transitions, 6832 flow [2024-06-14 13:20:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:20:47,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:20:47,509 INFO L175 Difference]: Start difference. First operand has 292 places, 383 transitions, 5243 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:20:47,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 418 transitions, 6832 flow [2024-06-14 13:20:48,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 418 transitions, 6471 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:48,944 INFO L231 Difference]: Finished difference. Result has 295 places, 390 transitions, 5379 flow [2024-06-14 13:20:48,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4892, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5379, PETRI_PLACES=295, PETRI_TRANSITIONS=390} [2024-06-14 13:20:48,944 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 250 predicate places. [2024-06-14 13:20:48,944 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 390 transitions, 5379 flow [2024-06-14 13:20:48,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:48,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:48,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:48,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:20:48,945 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:48,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1436866690, now seen corresponding path program 8 times [2024-06-14 13:20:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:48,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492743894] [2024-06-14 13:20:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:48,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:52,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:52,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492743894] [2024-06-14 13:20:52,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492743894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:52,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:52,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524618150] [2024-06-14 13:20:52,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:52,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:52,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:52,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:52,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 390 transitions, 5379 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:52,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:52,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:52,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:54,896 INFO L124 PetriNetUnfolderBase]: 4150/6624 cut-off events. [2024-06-14 13:20:54,897 INFO L125 PetriNetUnfolderBase]: For 908748/908748 co-relation queries the response was YES. [2024-06-14 13:20:54,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51135 conditions, 6624 events. 4150/6624 cut-off events. For 908748/908748 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 41026 event pairs, 1053 based on Foata normal form. 3/6614 useless extension candidates. Maximal degree in co-relation 50992. Up to 5732 conditions per place. [2024-06-14 13:20:54,969 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 319 selfloop transitions, 96 changer transitions 0/420 dead transitions. [2024-06-14 13:20:54,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 420 transitions, 6749 flow [2024-06-14 13:20:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:20:54,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:20:54,970 INFO L175 Difference]: Start difference. First operand has 295 places, 390 transitions, 5379 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:20:54,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 420 transitions, 6749 flow [2024-06-14 13:20:56,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 420 transitions, 6410 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:56,721 INFO L231 Difference]: Finished difference. Result has 301 places, 396 transitions, 5390 flow [2024-06-14 13:20:56,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5052, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5390, PETRI_PLACES=301, PETRI_TRANSITIONS=396} [2024-06-14 13:20:56,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-14 13:20:56,722 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 396 transitions, 5390 flow [2024-06-14 13:20:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:56,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:56,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:56,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:20:56,722 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:56,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash -130136596, now seen corresponding path program 9 times [2024-06-14 13:20:56,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:56,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130077821] [2024-06-14 13:20:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:56,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:00,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:00,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130077821] [2024-06-14 13:21:00,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130077821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:00,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:00,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:00,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249630833] [2024-06-14 13:21:00,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:00,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:00,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:00,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:00,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 396 transitions, 5390 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:00,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:00,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:00,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:03,072 INFO L124 PetriNetUnfolderBase]: 4141/6606 cut-off events. [2024-06-14 13:21:03,072 INFO L125 PetriNetUnfolderBase]: For 913673/913673 co-relation queries the response was YES. [2024-06-14 13:21:03,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50614 conditions, 6606 events. 4141/6606 cut-off events. For 913673/913673 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40899 event pairs, 1043 based on Foata normal form. 3/6596 useless extension candidates. Maximal degree in co-relation 50469. Up to 5728 conditions per place. [2024-06-14 13:21:03,148 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 319 selfloop transitions, 99 changer transitions 0/423 dead transitions. [2024-06-14 13:21:03,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 423 transitions, 6680 flow [2024-06-14 13:21:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:21:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:21:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:21:03,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-14 13:21:03,150 INFO L175 Difference]: Start difference. First operand has 301 places, 396 transitions, 5390 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:21:03,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 423 transitions, 6680 flow [2024-06-14 13:21:04,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 423 transitions, 6407 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 13:21:04,885 INFO L231 Difference]: Finished difference. Result has 304 places, 397 transitions, 5372 flow [2024-06-14 13:21:04,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5372, PETRI_PLACES=304, PETRI_TRANSITIONS=397} [2024-06-14 13:21:04,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 259 predicate places. [2024-06-14 13:21:04,886 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 397 transitions, 5372 flow [2024-06-14 13:21:04,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:04,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:04,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:04,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:21:04,887 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:04,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash -83155989, now seen corresponding path program 1 times [2024-06-14 13:21:04,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:04,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660673141] [2024-06-14 13:21:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:04,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:08,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660673141] [2024-06-14 13:21:08,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660673141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:08,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:08,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:08,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425876069] [2024-06-14 13:21:08,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:08,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:08,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:08,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:08,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 397 transitions, 5372 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:08,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:08,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:08,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:11,661 INFO L124 PetriNetUnfolderBase]: 4450/7124 cut-off events. [2024-06-14 13:21:11,661 INFO L125 PetriNetUnfolderBase]: For 1167865/1167877 co-relation queries the response was YES. [2024-06-14 13:21:11,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57307 conditions, 7124 events. 4450/7124 cut-off events. For 1167865/1167877 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44997 event pairs, 1159 based on Foata normal form. 24/7136 useless extension candidates. Maximal degree in co-relation 57160. Up to 5247 conditions per place. [2024-06-14 13:21:11,746 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 112 changer transitions 0/447 dead transitions. [2024-06-14 13:21:11,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 447 transitions, 6942 flow [2024-06-14 13:21:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 13:21:11,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 13:21:11,747 INFO L175 Difference]: Start difference. First operand has 304 places, 397 transitions, 5372 flow. Second operand 8 states and 155 transitions. [2024-06-14 13:21:11,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 447 transitions, 6942 flow [2024-06-14 13:21:13,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 447 transitions, 6754 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:21:13,664 INFO L231 Difference]: Finished difference. Result has 306 places, 403 transitions, 5582 flow [2024-06-14 13:21:13,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5582, PETRI_PLACES=306, PETRI_TRANSITIONS=403} [2024-06-14 13:21:13,664 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-14 13:21:13,665 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 403 transitions, 5582 flow [2024-06-14 13:21:13,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:13,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:13,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:13,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:21:13,665 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:13,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash -599680397, now seen corresponding path program 2 times [2024-06-14 13:21:13,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:13,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916261047] [2024-06-14 13:21:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:13,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:17,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:17,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916261047] [2024-06-14 13:21:17,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916261047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:17,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:17,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:17,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859091625] [2024-06-14 13:21:17,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:17,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:17,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:17,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:17,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:17,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:17,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 403 transitions, 5582 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:17,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:17,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:17,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:20,633 INFO L124 PetriNetUnfolderBase]: 4538/7250 cut-off events. [2024-06-14 13:21:20,633 INFO L125 PetriNetUnfolderBase]: For 1237419/1237431 co-relation queries the response was YES. [2024-06-14 13:21:20,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59072 conditions, 7250 events. 4538/7250 cut-off events. For 1237419/1237431 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 45775 event pairs, 1266 based on Foata normal form. 32/7270 useless extension candidates. Maximal degree in co-relation 58922. Up to 6111 conditions per place. [2024-06-14 13:21:20,707 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 320 selfloop transitions, 111 changer transitions 0/436 dead transitions. [2024-06-14 13:21:20,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 436 transitions, 6591 flow [2024-06-14 13:21:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:21:20,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 13:21:20,708 INFO L175 Difference]: Start difference. First operand has 306 places, 403 transitions, 5582 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:21:20,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 436 transitions, 6591 flow [2024-06-14 13:21:22,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 436 transitions, 6432 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 13:21:22,362 INFO L231 Difference]: Finished difference. Result has 311 places, 405 transitions, 5704 flow [2024-06-14 13:21:22,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5423, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5704, PETRI_PLACES=311, PETRI_TRANSITIONS=405} [2024-06-14 13:21:22,363 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-14 13:21:22,363 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 405 transitions, 5704 flow [2024-06-14 13:21:22,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:22,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:22,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:22,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:21:22,363 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:22,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:22,363 INFO L85 PathProgramCache]: Analyzing trace with hash -599684117, now seen corresponding path program 3 times [2024-06-14 13:21:22,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:22,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362796109] [2024-06-14 13:21:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:22,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362796109] [2024-06-14 13:21:26,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362796109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:26,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:26,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092367643] [2024-06-14 13:21:26,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:26,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:26,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:26,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 405 transitions, 5704 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:26,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:26,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:26,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:28,998 INFO L124 PetriNetUnfolderBase]: 4689/7479 cut-off events. [2024-06-14 13:21:28,998 INFO L125 PetriNetUnfolderBase]: For 1294133/1294145 co-relation queries the response was YES. [2024-06-14 13:21:29,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62426 conditions, 7479 events. 4689/7479 cut-off events. For 1294133/1294145 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47382 event pairs, 1271 based on Foata normal form. 24/7491 useless extension candidates. Maximal degree in co-relation 62274. Up to 6125 conditions per place. [2024-06-14 13:21:29,077 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 110 changer transitions 0/443 dead transitions. [2024-06-14 13:21:29,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 443 transitions, 6970 flow [2024-06-14 13:21:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:21:29,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 13:21:29,078 INFO L175 Difference]: Start difference. First operand has 311 places, 405 transitions, 5704 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:21:29,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 443 transitions, 6970 flow [2024-06-14 13:21:31,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 443 transitions, 6777 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:31,678 INFO L231 Difference]: Finished difference. Result has 315 places, 409 transitions, 5845 flow [2024-06-14 13:21:31,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5845, PETRI_PLACES=315, PETRI_TRANSITIONS=409} [2024-06-14 13:21:31,678 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-14 13:21:31,678 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 409 transitions, 5845 flow [2024-06-14 13:21:31,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:31,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:31,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:31,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:21:31,679 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:31,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2039979511, now seen corresponding path program 4 times [2024-06-14 13:21:31,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:31,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571993450] [2024-06-14 13:21:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:31,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:35,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571993450] [2024-06-14 13:21:35,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571993450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:35,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:35,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:21:35,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7788266] [2024-06-14 13:21:35,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:35,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:21:35,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:21:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:21:35,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:35,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 409 transitions, 5845 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:35,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:35,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:35,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:39,215 INFO L124 PetriNetUnfolderBase]: 4777/7613 cut-off events. [2024-06-14 13:21:39,215 INFO L125 PetriNetUnfolderBase]: For 1362205/1362205 co-relation queries the response was YES. [2024-06-14 13:21:39,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63568 conditions, 7613 events. 4777/7613 cut-off events. For 1362205/1362205 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 48353 event pairs, 1365 based on Foata normal form. 24/7620 useless extension candidates. Maximal degree in co-relation 63414. Up to 6480 conditions per place. [2024-06-14 13:21:39,297 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 321 selfloop transitions, 123 changer transitions 0/449 dead transitions. [2024-06-14 13:21:39,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 449 transitions, 6902 flow [2024-06-14 13:21:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:21:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:21:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 13:21:39,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39462809917355374 [2024-06-14 13:21:39,299 INFO L175 Difference]: Start difference. First operand has 315 places, 409 transitions, 5845 flow. Second operand 11 states and 191 transitions. [2024-06-14 13:21:39,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 449 transitions, 6902 flow [2024-06-14 13:21:42,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 449 transitions, 6723 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:42,056 INFO L231 Difference]: Finished difference. Result has 322 places, 411 transitions, 5979 flow [2024-06-14 13:21:42,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5666, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5979, PETRI_PLACES=322, PETRI_TRANSITIONS=411} [2024-06-14 13:21:42,057 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-14 13:21:42,057 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 411 transitions, 5979 flow [2024-06-14 13:21:42,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:42,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:42,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:42,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:21:42,057 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:42,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1425940767, now seen corresponding path program 5 times [2024-06-14 13:21:42,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:42,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337774948] [2024-06-14 13:21:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:46,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:46,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337774948] [2024-06-14 13:21:46,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337774948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:46,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:46,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:21:46,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821676392] [2024-06-14 13:21:46,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:46,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:21:46,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:21:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:21:46,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:46,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 411 transitions, 5979 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:46,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:46,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:46,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:49,336 INFO L124 PetriNetUnfolderBase]: 4839/7715 cut-off events. [2024-06-14 13:21:49,336 INFO L125 PetriNetUnfolderBase]: For 1372365/1372365 co-relation queries the response was YES. [2024-06-14 13:21:49,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64436 conditions, 7715 events. 4839/7715 cut-off events. For 1372365/1372365 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49056 event pairs, 1389 based on Foata normal form. 24/7722 useless extension candidates. Maximal degree in co-relation 64280. Up to 6578 conditions per place. [2024-06-14 13:21:49,432 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 324 selfloop transitions, 117 changer transitions 0/446 dead transitions. [2024-06-14 13:21:49,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 446 transitions, 7024 flow [2024-06-14 13:21:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:21:49,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:21:49,434 INFO L175 Difference]: Start difference. First operand has 322 places, 411 transitions, 5979 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:21:49,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 446 transitions, 7024 flow [2024-06-14 13:21:52,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 446 transitions, 6796 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 13:21:52,794 INFO L231 Difference]: Finished difference. Result has 323 places, 413 transitions, 6056 flow [2024-06-14 13:21:52,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5751, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6056, PETRI_PLACES=323, PETRI_TRANSITIONS=413} [2024-06-14 13:21:52,795 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-14 13:21:52,795 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 413 transitions, 6056 flow [2024-06-14 13:21:52,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:52,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:52,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:52,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:21:52,795 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:21:52,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1601207827, now seen corresponding path program 6 times [2024-06-14 13:21:52,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:52,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386521518] [2024-06-14 13:21:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:52,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:56,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:56,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386521518] [2024-06-14 13:21:56,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386521518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:56,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:56,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:21:56,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502977412] [2024-06-14 13:21:56,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:56,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:21:56,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:21:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:21:56,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:56,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 413 transitions, 6056 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:56,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:56,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:56,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:00,097 INFO L124 PetriNetUnfolderBase]: 4990/7936 cut-off events. [2024-06-14 13:22:00,097 INFO L125 PetriNetUnfolderBase]: For 1433130/1433130 co-relation queries the response was YES. [2024-06-14 13:22:00,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67390 conditions, 7936 events. 4990/7936 cut-off events. For 1433130/1433130 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 50615 event pairs, 1408 based on Foata normal form. 16/7935 useless extension candidates. Maximal degree in co-relation 67232. Up to 6454 conditions per place. [2024-06-14 13:22:00,179 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 332 selfloop transitions, 116 changer transitions 0/453 dead transitions. [2024-06-14 13:22:00,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 453 transitions, 7372 flow [2024-06-14 13:22:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:22:00,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 13:22:00,182 INFO L175 Difference]: Start difference. First operand has 323 places, 413 transitions, 6056 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:22:00,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 453 transitions, 7372 flow [2024-06-14 13:22:03,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 453 transitions, 7125 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:03,162 INFO L231 Difference]: Finished difference. Result has 327 places, 417 transitions, 6180 flow [2024-06-14 13:22:03,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6180, PETRI_PLACES=327, PETRI_TRANSITIONS=417} [2024-06-14 13:22:03,163 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-14 13:22:03,164 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 417 transitions, 6180 flow [2024-06-14 13:22:03,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:03,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:03,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:03,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:22:03,164 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:03,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1431662499, now seen corresponding path program 1 times [2024-06-14 13:22:03,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:03,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411837291] [2024-06-14 13:22:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:03,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:07,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:07,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411837291] [2024-06-14 13:22:07,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411837291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:07,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:07,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:22:07,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739262059] [2024-06-14 13:22:07,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:07,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:22:07,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:07,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:22:07,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:22:07,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:07,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 417 transitions, 6180 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:07,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:07,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:07,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:11,157 INFO L124 PetriNetUnfolderBase]: 5000/7964 cut-off events. [2024-06-14 13:22:11,158 INFO L125 PetriNetUnfolderBase]: For 1419179/1419179 co-relation queries the response was YES. [2024-06-14 13:22:11,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66668 conditions, 7964 events. 5000/7964 cut-off events. For 1419179/1419179 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 50903 event pairs, 1398 based on Foata normal form. 16/7963 useless extension candidates. Maximal degree in co-relation 66508. Up to 6649 conditions per place. [2024-06-14 13:22:11,247 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 324 selfloop transitions, 130 changer transitions 0/459 dead transitions. [2024-06-14 13:22:11,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 459 transitions, 7264 flow [2024-06-14 13:22:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:22:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:22:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-14 13:22:11,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39669421487603307 [2024-06-14 13:22:11,249 INFO L175 Difference]: Start difference. First operand has 327 places, 417 transitions, 6180 flow. Second operand 11 states and 192 transitions. [2024-06-14 13:22:11,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 459 transitions, 7264 flow [2024-06-14 13:22:14,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 459 transitions, 7059 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:14,577 INFO L231 Difference]: Finished difference. Result has 333 places, 419 transitions, 6302 flow [2024-06-14 13:22:14,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5975, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6302, PETRI_PLACES=333, PETRI_TRANSITIONS=419} [2024-06-14 13:22:14,578 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-14 13:22:14,578 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 419 transitions, 6302 flow [2024-06-14 13:22:14,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:14,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:14,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:14,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:22:14,579 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:14,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1784052343, now seen corresponding path program 7 times [2024-06-14 13:22:14,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:14,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244281308] [2024-06-14 13:22:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:14,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:18,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:18,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244281308] [2024-06-14 13:22:18,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244281308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:18,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:18,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:18,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541053197] [2024-06-14 13:22:18,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:18,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:18,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:18,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:18,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:18,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 419 transitions, 6302 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:18,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:18,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:18,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:21,550 INFO L124 PetriNetUnfolderBase]: 5228/8291 cut-off events. [2024-06-14 13:22:21,551 INFO L125 PetriNetUnfolderBase]: For 1702234/1702234 co-relation queries the response was YES. [2024-06-14 13:22:21,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68549 conditions, 8291 events. 5228/8291 cut-off events. For 1702234/1702234 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 53035 event pairs, 1368 based on Foata normal form. 68/8346 useless extension candidates. Maximal degree in co-relation 68387. Up to 7249 conditions per place. [2024-06-14 13:22:21,635 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 346 selfloop transitions, 95 changer transitions 7/453 dead transitions. [2024-06-14 13:22:21,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 453 transitions, 7347 flow [2024-06-14 13:22:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:22:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:22:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:22:21,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:22:21,637 INFO L175 Difference]: Start difference. First operand has 333 places, 419 transitions, 6302 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:22:21,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 453 transitions, 7347 flow [2024-06-14 13:22:24,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 453 transitions, 7036 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 13:22:24,632 INFO L231 Difference]: Finished difference. Result has 334 places, 416 transitions, 6161 flow [2024-06-14 13:22:24,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5991, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6161, PETRI_PLACES=334, PETRI_TRANSITIONS=416} [2024-06-14 13:22:24,632 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-14 13:22:24,632 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 416 transitions, 6161 flow [2024-06-14 13:22:24,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:24,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:24,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:22:24,633 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:24,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2023458939, now seen corresponding path program 2 times [2024-06-14 13:22:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:24,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402733963] [2024-06-14 13:22:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:24,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:28,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:28,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402733963] [2024-06-14 13:22:28,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402733963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:28,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:28,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:28,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294218748] [2024-06-14 13:22:28,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:28,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:28,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:28,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:28,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 416 transitions, 6161 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:28,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:28,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:28,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:31,646 INFO L124 PetriNetUnfolderBase]: 5148/8175 cut-off events. [2024-06-14 13:22:31,646 INFO L125 PetriNetUnfolderBase]: For 1588625/1588625 co-relation queries the response was YES. [2024-06-14 13:22:31,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65976 conditions, 8175 events. 5148/8175 cut-off events. For 1588625/1588625 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 52098 event pairs, 1210 based on Foata normal form. 56/8218 useless extension candidates. Maximal degree in co-relation 65813. Up to 6283 conditions per place. [2024-06-14 13:22:31,734 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 339 selfloop transitions, 96 changer transitions 17/457 dead transitions. [2024-06-14 13:22:31,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 457 transitions, 7449 flow [2024-06-14 13:22:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:22:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:22:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 13:22:31,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-14 13:22:31,735 INFO L175 Difference]: Start difference. First operand has 334 places, 416 transitions, 6161 flow. Second operand 10 states and 182 transitions. [2024-06-14 13:22:31,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 457 transitions, 7449 flow [2024-06-14 13:22:34,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 457 transitions, 7231 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:22:34,417 INFO L231 Difference]: Finished difference. Result has 336 places, 405 transitions, 6011 flow [2024-06-14 13:22:34,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5943, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6011, PETRI_PLACES=336, PETRI_TRANSITIONS=405} [2024-06-14 13:22:34,417 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-14 13:22:34,417 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 405 transitions, 6011 flow [2024-06-14 13:22:34,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:34,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:34,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:34,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:22:34,418 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:34,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:34,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2029030569, now seen corresponding path program 3 times [2024-06-14 13:22:34,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:34,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012628954] [2024-06-14 13:22:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:34,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:38,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:38,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012628954] [2024-06-14 13:22:38,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012628954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:38,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:38,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:38,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172718946] [2024-06-14 13:22:38,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:38,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:38,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:38,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:38,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 405 transitions, 6011 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:38,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:38,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:38,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:41,087 INFO L124 PetriNetUnfolderBase]: 4696/7475 cut-off events. [2024-06-14 13:22:41,087 INFO L125 PetriNetUnfolderBase]: For 1329190/1329190 co-relation queries the response was YES. [2024-06-14 13:22:41,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56411 conditions, 7475 events. 4696/7475 cut-off events. For 1329190/1329190 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 47466 event pairs, 1152 based on Foata normal form. 68/7530 useless extension candidates. Maximal degree in co-relation 56247. Up to 6495 conditions per place. [2024-06-14 13:22:41,160 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 349 selfloop transitions, 73 changer transitions 7/434 dead transitions. [2024-06-14 13:22:41,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 434 transitions, 6965 flow [2024-06-14 13:22:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:22:41,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-14 13:22:41,162 INFO L175 Difference]: Start difference. First operand has 336 places, 405 transitions, 6011 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:22:41,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 434 transitions, 6965 flow [2024-06-14 13:22:43,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 434 transitions, 6567 flow, removed 43 selfloop flow, removed 11 redundant places. [2024-06-14 13:22:43,949 INFO L231 Difference]: Finished difference. Result has 334 places, 400 transitions, 5684 flow [2024-06-14 13:22:43,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5684, PETRI_PLACES=334, PETRI_TRANSITIONS=400} [2024-06-14 13:22:43,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-14 13:22:43,950 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 400 transitions, 5684 flow [2024-06-14 13:22:43,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:43,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:43,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:43,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:22:43,950 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:43,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1989741577, now seen corresponding path program 8 times [2024-06-14 13:22:43,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:43,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541932055] [2024-06-14 13:22:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:47,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:47,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541932055] [2024-06-14 13:22:47,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541932055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:47,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:47,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:47,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687903647] [2024-06-14 13:22:47,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:47,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:47,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:47,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:47,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 400 transitions, 5684 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:47,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:47,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:47,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:50,790 INFO L124 PetriNetUnfolderBase]: 5005/7996 cut-off events. [2024-06-14 13:22:50,790 INFO L125 PetriNetUnfolderBase]: For 1527827/1527827 co-relation queries the response was YES. [2024-06-14 13:22:50,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62211 conditions, 7996 events. 5005/7996 cut-off events. For 1527827/1527827 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 51002 event pairs, 1199 based on Foata normal form. 56/8039 useless extension candidates. Maximal degree in co-relation 62047. Up to 6148 conditions per place. [2024-06-14 13:22:50,871 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 360 selfloop transitions, 73 changer transitions 0/438 dead transitions. [2024-06-14 13:22:50,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 438 transitions, 6933 flow [2024-06-14 13:22:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:22:50,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 13:22:50,873 INFO L175 Difference]: Start difference. First operand has 334 places, 400 transitions, 5684 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:22:50,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 438 transitions, 6933 flow [2024-06-14 13:22:53,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 438 transitions, 6514 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-14 13:22:53,804 INFO L231 Difference]: Finished difference. Result has 333 places, 402 transitions, 5489 flow [2024-06-14 13:22:53,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5489, PETRI_PLACES=333, PETRI_TRANSITIONS=402} [2024-06-14 13:22:53,804 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-14 13:22:53,805 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 402 transitions, 5489 flow [2024-06-14 13:22:53,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:53,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:53,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:53,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:22:53,805 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:22:53,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1318087462, now seen corresponding path program 1 times [2024-06-14 13:22:53,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:53,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970815843] [2024-06-14 13:22:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:58,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:58,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970815843] [2024-06-14 13:22:58,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970815843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:58,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:58,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:58,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518304947] [2024-06-14 13:22:58,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:58,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:58,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:58,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:58,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:58,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:58,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 402 transitions, 5489 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:58,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:58,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:58,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:01,196 INFO L124 PetriNetUnfolderBase]: 4987/7998 cut-off events. [2024-06-14 13:23:01,196 INFO L125 PetriNetUnfolderBase]: For 1252069/1252069 co-relation queries the response was YES. [2024-06-14 13:23:01,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61342 conditions, 7998 events. 4987/7998 cut-off events. For 1252069/1252069 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 51093 event pairs, 1272 based on Foata normal form. 8/7993 useless extension candidates. Maximal degree in co-relation 61177. Up to 7284 conditions per place. [2024-06-14 13:23:01,279 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 391 selfloop transitions, 36 changer transitions 0/432 dead transitions. [2024-06-14 13:23:01,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 432 transitions, 6679 flow [2024-06-14 13:23:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:23:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:23:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:23:01,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-14 13:23:01,280 INFO L175 Difference]: Start difference. First operand has 333 places, 402 transitions, 5489 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:23:01,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 432 transitions, 6679 flow [2024-06-14 13:23:03,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 432 transitions, 6270 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-14 13:23:03,926 INFO L231 Difference]: Finished difference. Result has 331 places, 402 transitions, 5156 flow [2024-06-14 13:23:03,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5080, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5156, PETRI_PLACES=331, PETRI_TRANSITIONS=402} [2024-06-14 13:23:03,927 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-14 13:23:03,927 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 402 transitions, 5156 flow [2024-06-14 13:23:03,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:03,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:03,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:03,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:23:03,928 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:03,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:03,929 INFO L85 PathProgramCache]: Analyzing trace with hash 462796010, now seen corresponding path program 2 times [2024-06-14 13:23:03,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:03,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279028530] [2024-06-14 13:23:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:03,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:07,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:07,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279028530] [2024-06-14 13:23:07,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279028530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:07,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:07,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:07,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219320282] [2024-06-14 13:23:07,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:07,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:07,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:07,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:07,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 402 transitions, 5156 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:07,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:07,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:07,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:10,657 INFO L124 PetriNetUnfolderBase]: 4969/7976 cut-off events. [2024-06-14 13:23:10,657 INFO L125 PetriNetUnfolderBase]: For 1223194/1223194 co-relation queries the response was YES. [2024-06-14 13:23:10,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58378 conditions, 7976 events. 4969/7976 cut-off events. For 1223194/1223194 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 51134 event pairs, 1419 based on Foata normal form. 8/7971 useless extension candidates. Maximal degree in co-relation 58215. Up to 7388 conditions per place. [2024-06-14 13:23:10,733 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 384 selfloop transitions, 37 changer transitions 0/426 dead transitions. [2024-06-14 13:23:10,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 426 transitions, 6108 flow [2024-06-14 13:23:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:23:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:23:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:23:10,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 13:23:10,734 INFO L175 Difference]: Start difference. First operand has 331 places, 402 transitions, 5156 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:23:10,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 426 transitions, 6108 flow [2024-06-14 13:23:13,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 426 transitions, 5994 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:13,346 INFO L231 Difference]: Finished difference. Result has 332 places, 402 transitions, 5122 flow [2024-06-14 13:23:13,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5042, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5122, PETRI_PLACES=332, PETRI_TRANSITIONS=402} [2024-06-14 13:23:13,347 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-14 13:23:13,347 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 402 transitions, 5122 flow [2024-06-14 13:23:13,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:13,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:13,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:13,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:23:13,347 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:13,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1439394412, now seen corresponding path program 1 times [2024-06-14 13:23:13,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:13,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694785987] [2024-06-14 13:23:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:13,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:16,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:16,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694785987] [2024-06-14 13:23:16,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694785987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:16,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:16,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:16,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074072284] [2024-06-14 13:23:16,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:16,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:16,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:16,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 402 transitions, 5122 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:16,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:16,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:16,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:19,628 INFO L124 PetriNetUnfolderBase]: 4979/8010 cut-off events. [2024-06-14 13:23:19,628 INFO L125 PetriNetUnfolderBase]: For 1213561/1213561 co-relation queries the response was YES. [2024-06-14 13:23:19,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58334 conditions, 8010 events. 4979/8010 cut-off events. For 1213561/1213561 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 51683 event pairs, 1472 based on Foata normal form. 2/8010 useless extension candidates. Maximal degree in co-relation 58171. Up to 7464 conditions per place. [2024-06-14 13:23:19,727 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 388 selfloop transitions, 58 changer transitions 0/451 dead transitions. [2024-06-14 13:23:19,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 451 transitions, 6414 flow [2024-06-14 13:23:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:23:19,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:23:19,728 INFO L175 Difference]: Start difference. First operand has 332 places, 402 transitions, 5122 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:23:19,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 451 transitions, 6414 flow [2024-06-14 13:23:22,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 451 transitions, 6322 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:22,235 INFO L231 Difference]: Finished difference. Result has 335 places, 405 transitions, 5194 flow [2024-06-14 13:23:22,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5030, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5194, PETRI_PLACES=335, PETRI_TRANSITIONS=405} [2024-06-14 13:23:22,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-14 13:23:22,236 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 405 transitions, 5194 flow [2024-06-14 13:23:22,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:22,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:22,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:22,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:23:22,237 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:22,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:22,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1686886850, now seen corresponding path program 1 times [2024-06-14 13:23:22,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:22,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049422973] [2024-06-14 13:23:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:22,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:25,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:25,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049422973] [2024-06-14 13:23:25,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049422973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:25,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:25,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:25,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442627177] [2024-06-14 13:23:25,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:25,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:25,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:25,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:25,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 405 transitions, 5194 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:25,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:25,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:25,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:28,769 INFO L124 PetriNetUnfolderBase]: 5021/8048 cut-off events. [2024-06-14 13:23:28,769 INFO L125 PetriNetUnfolderBase]: For 1256848/1256848 co-relation queries the response was YES. [2024-06-14 13:23:28,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59338 conditions, 8048 events. 5021/8048 cut-off events. For 1256848/1256848 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 51554 event pairs, 1129 based on Foata normal form. 2/8037 useless extension candidates. Maximal degree in co-relation 59174. Up to 6795 conditions per place. [2024-06-14 13:23:28,859 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 285 selfloop transitions, 152 changer transitions 0/442 dead transitions. [2024-06-14 13:23:28,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 442 transitions, 6490 flow [2024-06-14 13:23:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:23:28,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 13:23:28,861 INFO L175 Difference]: Start difference. First operand has 335 places, 405 transitions, 5194 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:23:28,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 442 transitions, 6490 flow [2024-06-14 13:23:31,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 442 transitions, 6362 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:31,749 INFO L231 Difference]: Finished difference. Result has 337 places, 411 transitions, 5594 flow [2024-06-14 13:23:31,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5594, PETRI_PLACES=337, PETRI_TRANSITIONS=411} [2024-06-14 13:23:31,749 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-14 13:23:31,749 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 411 transitions, 5594 flow [2024-06-14 13:23:31,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:31,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:31,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:31,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:23:31,749 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:31,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:31,750 INFO L85 PathProgramCache]: Analyzing trace with hash -96770446, now seen corresponding path program 2 times [2024-06-14 13:23:31,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:31,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433274374] [2024-06-14 13:23:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:31,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:35,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:35,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433274374] [2024-06-14 13:23:35,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433274374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:35,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:35,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:35,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048214746] [2024-06-14 13:23:35,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:35,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:35,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:35,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:35,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 411 transitions, 5594 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:35,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:35,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:35,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:38,725 INFO L124 PetriNetUnfolderBase]: 5015/8056 cut-off events. [2024-06-14 13:23:38,725 INFO L125 PetriNetUnfolderBase]: For 1273728/1273728 co-relation queries the response was YES. [2024-06-14 13:23:38,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60306 conditions, 8056 events. 5015/8056 cut-off events. For 1273728/1273728 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52005 event pairs, 1480 based on Foata normal form. 2/8056 useless extension candidates. Maximal degree in co-relation 60140. Up to 7517 conditions per place. [2024-06-14 13:23:38,807 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 394 selfloop transitions, 58 changer transitions 0/457 dead transitions. [2024-06-14 13:23:38,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 457 transitions, 6647 flow [2024-06-14 13:23:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:23:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:23:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:23:38,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 13:23:38,808 INFO L175 Difference]: Start difference. First operand has 337 places, 411 transitions, 5594 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:23:38,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 457 transitions, 6647 flow [2024-06-14 13:23:41,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 457 transitions, 6386 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:41,274 INFO L231 Difference]: Finished difference. Result has 341 places, 411 transitions, 5455 flow [2024-06-14 13:23:41,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5333, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5455, PETRI_PLACES=341, PETRI_TRANSITIONS=411} [2024-06-14 13:23:41,274 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-14 13:23:41,275 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 411 transitions, 5455 flow [2024-06-14 13:23:41,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:41,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:41,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:23:41,275 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:41,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1805671526, now seen corresponding path program 3 times [2024-06-14 13:23:41,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:41,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016211084] [2024-06-14 13:23:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:44,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:44,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016211084] [2024-06-14 13:23:44,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016211084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:44,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:44,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:44,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092838893] [2024-06-14 13:23:44,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:44,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:44,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:44,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 411 transitions, 5455 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:44,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:44,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:44,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:48,245 INFO L124 PetriNetUnfolderBase]: 5105/8172 cut-off events. [2024-06-14 13:23:48,246 INFO L125 PetriNetUnfolderBase]: For 1331455/1331455 co-relation queries the response was YES. [2024-06-14 13:23:48,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61718 conditions, 8172 events. 5105/8172 cut-off events. For 1331455/1331455 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 52395 event pairs, 1181 based on Foata normal form. 2/8169 useless extension candidates. Maximal degree in co-relation 61552. Up to 6304 conditions per place. [2024-06-14 13:23:48,350 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 262 selfloop transitions, 204 changer transitions 0/471 dead transitions. [2024-06-14 13:23:48,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 471 transitions, 7413 flow [2024-06-14 13:23:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 13:23:48,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 13:23:48,352 INFO L175 Difference]: Start difference. First operand has 341 places, 411 transitions, 5455 flow. Second operand 9 states and 183 transitions. [2024-06-14 13:23:48,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 471 transitions, 7413 flow [2024-06-14 13:23:51,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 471 transitions, 7306 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:51,367 INFO L231 Difference]: Finished difference. Result has 343 places, 424 transitions, 5997 flow [2024-06-14 13:23:51,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5997, PETRI_PLACES=343, PETRI_TRANSITIONS=424} [2024-06-14 13:23:51,367 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-14 13:23:51,368 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 424 transitions, 5997 flow [2024-06-14 13:23:51,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:51,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:51,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:51,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:23:51,368 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:23:51,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:51,369 INFO L85 PathProgramCache]: Analyzing trace with hash -129000534, now seen corresponding path program 2 times [2024-06-14 13:23:51,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:51,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200185605] [2024-06-14 13:23:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:51,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:55,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:55,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200185605] [2024-06-14 13:23:55,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200185605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:55,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:55,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:55,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492337497] [2024-06-14 13:23:55,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:55,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:55,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:55,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:55,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:55,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 424 transitions, 5997 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:55,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:55,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:55,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:58,241 INFO L124 PetriNetUnfolderBase]: 5115/8176 cut-off events. [2024-06-14 13:23:58,241 INFO L125 PetriNetUnfolderBase]: For 1360810/1360810 co-relation queries the response was YES. [2024-06-14 13:23:58,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62849 conditions, 8176 events. 5115/8176 cut-off events. For 1360810/1360810 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 52421 event pairs, 1426 based on Foata normal form. 2/8149 useless extension candidates. Maximal degree in co-relation 62682. Up to 6310 conditions per place. [2024-06-14 13:23:58,345 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 266 selfloop transitions, 186 changer transitions 0/457 dead transitions. [2024-06-14 13:23:58,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 457 transitions, 7503 flow [2024-06-14 13:23:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:23:58,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 13:23:58,346 INFO L175 Difference]: Start difference. First operand has 343 places, 424 transitions, 5997 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:23:58,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 457 transitions, 7503 flow [2024-06-14 13:24:01,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 457 transitions, 6983 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 13:24:01,553 INFO L231 Difference]: Finished difference. Result has 345 places, 427 transitions, 5929 flow [2024-06-14 13:24:01,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5481, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5929, PETRI_PLACES=345, PETRI_TRANSITIONS=427} [2024-06-14 13:24:01,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-14 13:24:01,554 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 427 transitions, 5929 flow [2024-06-14 13:24:01,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:01,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:01,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:01,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:24:01,554 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:01,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1864436806, now seen corresponding path program 4 times [2024-06-14 13:24:01,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:01,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112309351] [2024-06-14 13:24:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:01,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:04,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:04,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112309351] [2024-06-14 13:24:04,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112309351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:04,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:04,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:04,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200109630] [2024-06-14 13:24:04,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:04,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:04,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:04,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:04,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 427 transitions, 5929 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:04,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:04,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:04,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:08,449 INFO L124 PetriNetUnfolderBase]: 5700/9083 cut-off events. [2024-06-14 13:24:08,449 INFO L125 PetriNetUnfolderBase]: For 1584628/1584634 co-relation queries the response was YES. [2024-06-14 13:24:08,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72346 conditions, 9083 events. 5700/9083 cut-off events. For 1584628/1584634 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 58630 event pairs, 1304 based on Foata normal form. 3/9070 useless extension candidates. Maximal degree in co-relation 72178. Up to 6638 conditions per place. [2024-06-14 13:24:08,566 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 304 selfloop transitions, 285 changer transitions 0/594 dead transitions. [2024-06-14 13:24:08,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 594 transitions, 10028 flow [2024-06-14 13:24:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:24:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:24:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 13:24:08,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:24:08,568 INFO L175 Difference]: Start difference. First operand has 345 places, 427 transitions, 5929 flow. Second operand 10 states and 190 transitions. [2024-06-14 13:24:08,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 594 transitions, 10028 flow [2024-06-14 13:24:12,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 594 transitions, 9484 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 13:24:12,565 INFO L231 Difference]: Finished difference. Result has 355 places, 528 transitions, 8032 flow [2024-06-14 13:24:12,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5530, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8032, PETRI_PLACES=355, PETRI_TRANSITIONS=528} [2024-06-14 13:24:12,566 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-14 13:24:12,566 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 528 transitions, 8032 flow [2024-06-14 13:24:12,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:12,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:12,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:12,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:24:12,566 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:12,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1847747364, now seen corresponding path program 5 times [2024-06-14 13:24:12,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:12,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824907698] [2024-06-14 13:24:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:12,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:15,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:15,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824907698] [2024-06-14 13:24:15,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824907698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:15,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:15,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:15,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343007010] [2024-06-14 13:24:15,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:15,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:15,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:15,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:15,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 528 transitions, 8032 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:15,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:15,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:15,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:19,311 INFO L124 PetriNetUnfolderBase]: 6221/9884 cut-off events. [2024-06-14 13:24:19,311 INFO L125 PetriNetUnfolderBase]: For 1735408/1735410 co-relation queries the response was YES. [2024-06-14 13:24:19,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82011 conditions, 9884 events. 6221/9884 cut-off events. For 1735408/1735410 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 64637 event pairs, 1281 based on Foata normal form. 6/9884 useless extension candidates. Maximal degree in co-relation 81837. Up to 6912 conditions per place. [2024-06-14 13:24:19,441 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 314 selfloop transitions, 400 changer transitions 0/719 dead transitions. [2024-06-14 13:24:19,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 719 transitions, 13073 flow [2024-06-14 13:24:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 13:24:19,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 13:24:19,443 INFO L175 Difference]: Start difference. First operand has 355 places, 528 transitions, 8032 flow. Second operand 9 states and 186 transitions. [2024-06-14 13:24:19,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 719 transitions, 13073 flow [2024-06-14 13:24:23,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 719 transitions, 12628 flow, removed 97 selfloop flow, removed 2 redundant places. [2024-06-14 13:24:23,920 INFO L231 Difference]: Finished difference. Result has 366 places, 649 transitions, 10893 flow [2024-06-14 13:24:23,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7722, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10893, PETRI_PLACES=366, PETRI_TRANSITIONS=649} [2024-06-14 13:24:23,920 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-14 13:24:23,920 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 649 transitions, 10893 flow [2024-06-14 13:24:23,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:23,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:23,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:23,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:24:23,921 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:23,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash 929862288, now seen corresponding path program 6 times [2024-06-14 13:24:23,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:23,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381035130] [2024-06-14 13:24:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:27,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:27,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381035130] [2024-06-14 13:24:27,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381035130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:27,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:27,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:27,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311260690] [2024-06-14 13:24:27,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:27,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:27,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:27,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:27,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 649 transitions, 10893 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:27,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:27,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:27,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:31,450 INFO L124 PetriNetUnfolderBase]: 6288/9993 cut-off events. [2024-06-14 13:24:31,450 INFO L125 PetriNetUnfolderBase]: For 1777815/1777815 co-relation queries the response was YES. [2024-06-14 13:24:31,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84931 conditions, 9993 events. 6288/9993 cut-off events. For 1777815/1777815 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 65424 event pairs, 1447 based on Foata normal form. 4/9991 useless extension candidates. Maximal degree in co-relation 84751. Up to 6938 conditions per place. [2024-06-14 13:24:31,582 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 325 selfloop transitions, 410 changer transitions 0/740 dead transitions. [2024-06-14 13:24:31,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 740 transitions, 13909 flow [2024-06-14 13:24:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:24:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:24:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 13:24:31,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-14 13:24:31,584 INFO L175 Difference]: Start difference. First operand has 366 places, 649 transitions, 10893 flow. Second operand 10 states and 194 transitions. [2024-06-14 13:24:31,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 740 transitions, 13909 flow [2024-06-14 13:24:36,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 740 transitions, 13335 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-14 13:24:36,671 INFO L231 Difference]: Finished difference. Result has 377 places, 680 transitions, 11967 flow [2024-06-14 13:24:36,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10338, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11967, PETRI_PLACES=377, PETRI_TRANSITIONS=680} [2024-06-14 13:24:36,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-14 13:24:36,672 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 680 transitions, 11967 flow [2024-06-14 13:24:36,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:36,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:36,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:36,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:24:36,672 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:36,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:36,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1832458390, now seen corresponding path program 7 times [2024-06-14 13:24:36,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:36,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853184249] [2024-06-14 13:24:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:36,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:39,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853184249] [2024-06-14 13:24:39,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853184249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:39,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:39,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:39,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216271434] [2024-06-14 13:24:39,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:39,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:39,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:39,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:39,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:39,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:39,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 680 transitions, 11967 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:39,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:39,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:39,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:43,792 INFO L124 PetriNetUnfolderBase]: 6292/10001 cut-off events. [2024-06-14 13:24:43,792 INFO L125 PetriNetUnfolderBase]: For 1805421/1805423 co-relation queries the response was YES. [2024-06-14 13:24:43,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85861 conditions, 10001 events. 6292/10001 cut-off events. For 1805421/1805423 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 65529 event pairs, 1304 based on Foata normal form. 6/10001 useless extension candidates. Maximal degree in co-relation 85676. Up to 6941 conditions per place. [2024-06-14 13:24:43,918 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 311 selfloop transitions, 427 changer transitions 0/743 dead transitions. [2024-06-14 13:24:43,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 743 transitions, 14962 flow [2024-06-14 13:24:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 13:24:43,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-14 13:24:43,920 INFO L175 Difference]: Start difference. First operand has 377 places, 680 transitions, 11967 flow. Second operand 9 states and 182 transitions. [2024-06-14 13:24:43,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 743 transitions, 14962 flow [2024-06-14 13:24:48,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 743 transitions, 14350 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 13:24:48,939 INFO L231 Difference]: Finished difference. Result has 383 places, 687 transitions, 12453 flow [2024-06-14 13:24:48,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11358, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12453, PETRI_PLACES=383, PETRI_TRANSITIONS=687} [2024-06-14 13:24:48,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-14 13:24:48,940 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 687 transitions, 12453 flow [2024-06-14 13:24:48,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:48,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:48,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:48,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:24:48,940 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:24:48,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1613276820, now seen corresponding path program 3 times [2024-06-14 13:24:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:48,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835051749] [2024-06-14 13:24:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:52,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:52,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835051749] [2024-06-14 13:24:52,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835051749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:52,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:52,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:52,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617721811] [2024-06-14 13:24:52,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:52,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:52,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:52,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:52,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:52,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:52,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 687 transitions, 12453 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:52,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:52,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:52,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:56,435 INFO L124 PetriNetUnfolderBase]: 6302/9997 cut-off events. [2024-06-14 13:24:56,435 INFO L125 PetriNetUnfolderBase]: For 1831908/1831908 co-relation queries the response was YES. [2024-06-14 13:24:56,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86807 conditions, 9997 events. 6302/9997 cut-off events. For 1831908/1831908 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 65442 event pairs, 1731 based on Foata normal form. 2/9950 useless extension candidates. Maximal degree in co-relation 86620. Up to 6947 conditions per place. [2024-06-14 13:24:56,563 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 333 selfloop transitions, 381 changer transitions 0/719 dead transitions. [2024-06-14 13:24:56,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 719 transitions, 14759 flow [2024-06-14 13:24:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:24:56,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:24:56,565 INFO L175 Difference]: Start difference. First operand has 383 places, 687 transitions, 12453 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:24:56,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 719 transitions, 14759 flow [2024-06-14 13:25:01,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 719 transitions, 14134 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:01,352 INFO L231 Difference]: Finished difference. Result has 387 places, 690 transitions, 12671 flow [2024-06-14 13:25:01,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11835, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12671, PETRI_PLACES=387, PETRI_TRANSITIONS=690} [2024-06-14 13:25:01,353 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 342 predicate places. [2024-06-14 13:25:01,353 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 690 transitions, 12671 flow [2024-06-14 13:25:01,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:01,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:01,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:25:01,353 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:01,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1334540444, now seen corresponding path program 8 times [2024-06-14 13:25:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740471203] [2024-06-14 13:25:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:05,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740471203] [2024-06-14 13:25:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740471203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:05,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:05,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:05,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149690316] [2024-06-14 13:25:05,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:05,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:05,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:05,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:05,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:05,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:25:05,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 690 transitions, 12671 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:05,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:05,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:25:05,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:09,276 INFO L124 PetriNetUnfolderBase]: 6306/10027 cut-off events. [2024-06-14 13:25:09,276 INFO L125 PetriNetUnfolderBase]: For 1865331/1865331 co-relation queries the response was YES. [2024-06-14 13:25:09,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86842 conditions, 10027 events. 6306/10027 cut-off events. For 1865331/1865331 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 65714 event pairs, 1455 based on Foata normal form. 4/10025 useless extension candidates. Maximal degree in co-relation 86654. Up to 6950 conditions per place. [2024-06-14 13:25:09,401 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 324 selfloop transitions, 419 changer transitions 0/748 dead transitions. [2024-06-14 13:25:09,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 748 transitions, 15226 flow [2024-06-14 13:25:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:25:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:25:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 13:25:09,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:25:09,402 INFO L175 Difference]: Start difference. First operand has 387 places, 690 transitions, 12671 flow. Second operand 10 states and 190 transitions. [2024-06-14 13:25:09,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 748 transitions, 15226 flow [2024-06-14 13:25:15,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 748 transitions, 14247 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 13:25:15,310 INFO L231 Difference]: Finished difference. Result has 391 places, 696 transitions, 12695 flow [2024-06-14 13:25:15,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11711, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12695, PETRI_PLACES=391, PETRI_TRANSITIONS=696} [2024-06-14 13:25:15,310 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-14 13:25:15,310 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 696 transitions, 12695 flow [2024-06-14 13:25:15,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:15,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:15,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:15,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:25:15,311 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:15,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1344014996, now seen corresponding path program 4 times [2024-06-14 13:25:15,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:15,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275551891] [2024-06-14 13:25:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:15,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:19,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:19,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275551891] [2024-06-14 13:25:19,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275551891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:19,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:19,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:19,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043125874] [2024-06-14 13:25:19,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:19,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:19,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:25:19,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 696 transitions, 12695 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:19,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:19,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:25:19,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:23,203 INFO L124 PetriNetUnfolderBase]: 6300/9986 cut-off events. [2024-06-14 13:25:23,203 INFO L125 PetriNetUnfolderBase]: For 1870939/1870939 co-relation queries the response was YES. [2024-06-14 13:25:23,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86905 conditions, 9986 events. 6300/9986 cut-off events. For 1870939/1870939 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 65247 event pairs, 1732 based on Foata normal form. 2/9939 useless extension candidates. Maximal degree in co-relation 86715. Up to 6947 conditions per place. [2024-06-14 13:25:23,341 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 348 selfloop transitions, 371 changer transitions 0/724 dead transitions. [2024-06-14 13:25:23,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 724 transitions, 14722 flow [2024-06-14 13:25:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:25:23,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:25:23,343 INFO L175 Difference]: Start difference. First operand has 391 places, 696 transitions, 12695 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:25:23,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 724 transitions, 14722 flow [2024-06-14 13:25:29,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 724 transitions, 14066 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:29,182 INFO L231 Difference]: Finished difference. Result has 395 places, 696 transitions, 12796 flow [2024-06-14 13:25:29,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12042, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12796, PETRI_PLACES=395, PETRI_TRANSITIONS=696} [2024-06-14 13:25:29,183 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-14 13:25:29,183 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 696 transitions, 12796 flow [2024-06-14 13:25:29,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:29,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:29,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:29,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:25:29,183 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:29,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1328142974, now seen corresponding path program 9 times [2024-06-14 13:25:29,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:29,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396436769] [2024-06-14 13:25:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:29,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:32,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:32,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396436769] [2024-06-14 13:25:32,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396436769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:32,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:32,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:32,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378429331] [2024-06-14 13:25:32,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:32,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:32,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:32,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:32,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:32,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:25:32,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 696 transitions, 12796 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:32,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:32,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:25:32,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:36,800 INFO L124 PetriNetUnfolderBase]: 6324/10057 cut-off events. [2024-06-14 13:25:36,800 INFO L125 PetriNetUnfolderBase]: For 1903833/1903833 co-relation queries the response was YES. [2024-06-14 13:25:36,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87133 conditions, 10057 events. 6324/10057 cut-off events. For 1903833/1903833 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 65958 event pairs, 1441 based on Foata normal form. 4/10055 useless extension candidates. Maximal degree in co-relation 86942. Up to 6958 conditions per place. [2024-06-14 13:25:36,949 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 325 selfloop transitions, 428 changer transitions 0/758 dead transitions. [2024-06-14 13:25:36,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 758 transitions, 15486 flow [2024-06-14 13:25:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:25:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:25:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 13:25:36,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-14 13:25:36,951 INFO L175 Difference]: Start difference. First operand has 395 places, 696 transitions, 12796 flow. Second operand 10 states and 192 transitions. [2024-06-14 13:25:36,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 758 transitions, 15486 flow [2024-06-14 13:25:42,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 758 transitions, 14692 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:25:42,570 INFO L231 Difference]: Finished difference. Result has 399 places, 705 transitions, 13116 flow [2024-06-14 13:25:42,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12020, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13116, PETRI_PLACES=399, PETRI_TRANSITIONS=705} [2024-06-14 13:25:42,571 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-14 13:25:42,571 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 705 transitions, 13116 flow [2024-06-14 13:25:42,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:42,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:42,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:42,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:25:42,572 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:42,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:42,572 INFO L85 PathProgramCache]: Analyzing trace with hash 948085886, now seen corresponding path program 5 times [2024-06-14 13:25:42,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:42,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169052137] [2024-06-14 13:25:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:42,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:46,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:46,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169052137] [2024-06-14 13:25:46,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169052137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:46,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:46,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381936489] [2024-06-14 13:25:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:46,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:25:46,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 705 transitions, 13116 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:46,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:46,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:25:46,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:49,873 INFO L124 PetriNetUnfolderBase]: 6334/10028 cut-off events. [2024-06-14 13:25:49,873 INFO L125 PetriNetUnfolderBase]: For 1924217/1924217 co-relation queries the response was YES. [2024-06-14 13:25:49,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87753 conditions, 10028 events. 6334/10028 cut-off events. For 1924217/1924217 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 65369 event pairs, 1575 based on Foata normal form. 2/10013 useless extension candidates. Maximal degree in co-relation 87560. Up to 8789 conditions per place. [2024-06-14 13:25:50,015 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 581 selfloop transitions, 147 changer transitions 0/733 dead transitions. [2024-06-14 13:25:50,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 733 transitions, 15185 flow [2024-06-14 13:25:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:25:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:25:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:25:50,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-14 13:25:50,016 INFO L175 Difference]: Start difference. First operand has 399 places, 705 transitions, 13116 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:25:50,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 733 transitions, 15185 flow [2024-06-14 13:25:56,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 733 transitions, 14527 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:56,940 INFO L231 Difference]: Finished difference. Result has 404 places, 708 transitions, 12828 flow [2024-06-14 13:25:56,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12463, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12828, PETRI_PLACES=404, PETRI_TRANSITIONS=708} [2024-06-14 13:25:56,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 359 predicate places. [2024-06-14 13:25:56,940 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 708 transitions, 12828 flow [2024-06-14 13:25:56,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:56,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:56,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:56,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:25:56,941 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:25:56,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1696235790, now seen corresponding path program 10 times [2024-06-14 13:25:56,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:56,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415475019] [2024-06-14 13:25:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:56,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:00,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:00,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415475019] [2024-06-14 13:26:00,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415475019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:00,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:00,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993447071] [2024-06-14 13:26:00,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:00,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:00,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:00,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:00,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:26:00,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 708 transitions, 12828 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:00,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:00,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:26:00,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:03,986 INFO L124 PetriNetUnfolderBase]: 6358/10093 cut-off events. [2024-06-14 13:26:03,987 INFO L125 PetriNetUnfolderBase]: For 1938528/1938528 co-relation queries the response was YES. [2024-06-14 13:26:04,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86984 conditions, 10093 events. 6358/10093 cut-off events. For 1938528/1938528 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 66442 event pairs, 1766 based on Foata normal form. 4/10094 useless extension candidates. Maximal degree in co-relation 86790. Up to 9512 conditions per place. [2024-06-14 13:26:04,142 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 684 selfloop transitions, 67 changer transitions 0/756 dead transitions. [2024-06-14 13:26:04,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 756 transitions, 15153 flow [2024-06-14 13:26:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:26:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:26:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:26:04,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3795454545454545 [2024-06-14 13:26:04,144 INFO L175 Difference]: Start difference. First operand has 404 places, 708 transitions, 12828 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:26:04,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 756 transitions, 15153 flow [2024-06-14 13:26:10,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 756 transitions, 14766 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:26:10,358 INFO L231 Difference]: Finished difference. Result has 412 places, 726 transitions, 13182 flow [2024-06-14 13:26:10,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12477, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13182, PETRI_PLACES=412, PETRI_TRANSITIONS=726} [2024-06-14 13:26:10,358 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-14 13:26:10,358 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 726 transitions, 13182 flow [2024-06-14 13:26:10,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:10,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:10,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:10,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:26:10,359 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:26:10,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:10,359 INFO L85 PathProgramCache]: Analyzing trace with hash -429115302, now seen corresponding path program 6 times [2024-06-14 13:26:10,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:10,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690565763] [2024-06-14 13:26:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:10,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:13,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:13,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690565763] [2024-06-14 13:26:13,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690565763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:13,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:13,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:13,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109087626] [2024-06-14 13:26:13,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:13,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:13,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:13,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:26:13,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 726 transitions, 13182 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:13,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:13,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:26:13,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:17,653 INFO L124 PetriNetUnfolderBase]: 6368/10079 cut-off events. [2024-06-14 13:26:17,653 INFO L125 PetriNetUnfolderBase]: For 1954070/1954070 co-relation queries the response was YES. [2024-06-14 13:26:17,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87489 conditions, 10079 events. 6368/10079 cut-off events. For 1954070/1954070 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 65759 event pairs, 1589 based on Foata normal form. 2/10063 useless extension candidates. Maximal degree in co-relation 87288. Up to 8817 conditions per place. [2024-06-14 13:26:17,779 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 587 selfloop transitions, 158 changer transitions 0/750 dead transitions. [2024-06-14 13:26:17,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 750 transitions, 15279 flow [2024-06-14 13:26:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:26:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:26:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:26:17,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:26:17,780 INFO L175 Difference]: Start difference. First operand has 412 places, 726 transitions, 13182 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:26:17,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 750 transitions, 15279 flow Killed by 15